diff --git a/app/components/Nav/Main/RootRPCMethodsUI.js b/app/components/Nav/Main/RootRPCMethodsUI.js
index 086d3c3a61f..310fa254e2e 100644
--- a/app/components/Nav/Main/RootRPCMethodsUI.js
+++ b/app/components/Nav/Main/RootRPCMethodsUI.js
@@ -25,7 +25,7 @@ import {
   getIsSwapApproveOrSwapTransaction,
   isApprovalTransaction,
 } from '../../../util/transactions';
-import { BN } from 'ethereumjs-util';
+import BN from 'bnjs4';
 import Logger from '../../../util/Logger';
 import TransactionTypes from '../../../core/TransactionTypes';
 import { swapsUtils } from '@metamask/swaps-controller';
diff --git a/app/components/UI/ConfirmAddAsset/ConfirmAddAsset.test.tsx b/app/components/UI/ConfirmAddAsset/ConfirmAddAsset.test.tsx
index ed1a2f5fdc3..b3109f95aa8 100644
--- a/app/components/UI/ConfirmAddAsset/ConfirmAddAsset.test.tsx
+++ b/app/components/UI/ConfirmAddAsset/ConfirmAddAsset.test.tsx
@@ -7,7 +7,7 @@ import renderWithProvider, {
 import useBalance from '../Ramp/hooks/useBalance';
 import { toTokenMinimalUnit } from '../../../util/number';
 import { fireEvent } from '@testing-library/react-native';
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 import { RootState } from '../../../reducers';
 import { mockNetworkState } from '../../../util/test/network';
 import { CHAIN_IDS } from '@metamask/transaction-controller';
@@ -48,7 +48,7 @@ jest.mock('../../../util/navigation/navUtils', () => ({
 
 const mockUseBalanceInitialValue: Partial<ReturnType<typeof useBalance>> = {
   balanceFiat: '$27.02',
-  balanceBN: toTokenMinimalUnit('5.36385', 18) as BN,
+  balanceBN: toTokenMinimalUnit('5.36385', 18) as BN4,
 };
 
 const mockUseBalanceValues: Partial<ReturnType<typeof useBalance>> = {
diff --git a/app/components/UI/Ramp/Views/BuildQuote/BuildQuote.test.tsx b/app/components/UI/Ramp/Views/BuildQuote/BuildQuote.test.tsx
index 9fb61eadebc..0a1eaf58221 100644
--- a/app/components/UI/Ramp/Views/BuildQuote/BuildQuote.test.tsx
+++ b/app/components/UI/Ramp/Views/BuildQuote/BuildQuote.test.tsx
@@ -1,7 +1,7 @@
 import React from 'react';
 import { Limits, Payment } from '@consensys/on-ramp-sdk';
 import { act, fireEvent, screen } from '@testing-library/react-native';
-import { BN } from 'ethereumjs-util';
+import type BN4 from 'bnjs4';
 import { renderScreen } from '../../../../../util/test/renderWithProvider';
 import BuildQuote from './BuildQuote';
 import useRegions from '../../hooks/useRegions';
@@ -191,7 +191,7 @@ jest.mock('../../../../hooks/useAddressBalance/useAddressBalance', () =>
 
 const mockUseBalanceInitialValue: Partial<ReturnType<typeof useBalance>> = {
   balanceFiat: '$27.02',
-  balanceBN: toTokenMinimalUnit('5.36385', 18) as BN,
+  balanceBN: toTokenMinimalUnit('5.36385', 18) as BN4,
 };
 
 let mockUseBalanceValues: Partial<ReturnType<typeof useBalance>> = {
@@ -242,7 +242,7 @@ const mockUseGasPriceEstimationInitialValue: ReturnType<
   estimatedGasFee: toTokenMinimalUnit(
     '0.01',
     mockUseRampSDKInitialValues.selectedAsset?.decimals || 18,
-  ) as BN,
+  ) as BN4,
 };
 
 let mockUseGasPriceEstimationValue: ReturnType<typeof useGasPriceEstimation> =
@@ -669,7 +669,7 @@ describe('BuildQuote View', () => {
       mockUseBalanceValues.balanceBN = toTokenMinimalUnit(
         '5',
         mockUseRampSDKValues.selectedAsset?.decimals || 18,
-      ) as BN;
+      ) as BN4;
       render(BuildQuote);
       const initialAmount = '0';
       const overBalanceAmout = '6';
@@ -688,7 +688,7 @@ describe('BuildQuote View', () => {
       mockUseBalanceValues.balanceBN = toTokenMinimalUnit(
         '1',
         mockUseRampSDKValues.selectedAsset?.decimals || 18,
-      ) as BN;
+      ) as BN4;
       const symbol = mockUseRampSDKValues.selectedAsset?.symbol;
       fireEvent.press(getByRoleButton(`${initialAmount} ${symbol}`));
       fireEvent.press(getByRoleButton('25%'));
@@ -719,13 +719,13 @@ describe('BuildQuote View', () => {
         balanceBN: toTokenMinimalUnit(
           '1',
           mockUseRampSDKValues.selectedAsset?.decimals || 18,
-        ) as BN,
+        ) as BN4,
       };
       mockUseGasPriceEstimationValue = {
         estimatedGasFee: toTokenMinimalUnit(
           '0.27',
           mockUseRampSDKValues.selectedAsset?.decimals || 18,
-        ) as BN,
+        ) as BN4,
       };
       const symbol = mockUseRampSDKValues.selectedAsset?.symbol;
       fireEvent.press(getByRoleButton(`${initialAmount} ${symbol}`));
@@ -752,13 +752,13 @@ describe('BuildQuote View', () => {
         balanceBN: toTokenMinimalUnit(
           '1',
           mockUseRampSDKValues.selectedAsset?.decimals || 18,
-        ) as BN,
+        ) as BN4,
       };
       mockUseGasPriceEstimationValue = {
         estimatedGasFee: toTokenMinimalUnit(
           '0.27',
           mockUseRampSDKValues.selectedAsset?.decimals || 18,
-        ) as BN,
+        ) as BN4,
       };
       const symbol = mockUseRampSDKValues.selectedAsset?.symbol;
       fireEvent.press(getByRoleButton(`${initialAmount} ${symbol}`));
diff --git a/app/components/UI/Ramp/Views/BuildQuote/BuildQuote.tsx b/app/components/UI/Ramp/Views/BuildQuote/BuildQuote.tsx
index 04727253c4b..565210a8e3d 100644
--- a/app/components/UI/Ramp/Views/BuildQuote/BuildQuote.tsx
+++ b/app/components/UI/Ramp/Views/BuildQuote/BuildQuote.tsx
@@ -12,7 +12,7 @@ import Animated, {
   withTiming,
 } from 'react-native-reanimated';
 import { useNavigation } from '@react-navigation/native';
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 
 import { useRampSDK } from '../../sdk';
 import usePaymentMethods from '../../hooks/usePaymentMethods';
@@ -104,7 +104,7 @@ const BuildQuote = () => {
   const [amountFocused, setAmountFocused] = useState(false);
   const [amount, setAmount] = useState('0');
   const [amountNumber, setAmountNumber] = useState(0);
-  const [amountBNMinimalUnit, setAmountBNMinimalUnit] = useState<BN>();
+  const [amountBNMinimalUnit, setAmountBNMinimalUnit] = useState<BN4>();
   const [error, setError] = useState<string | null>(null);
   const keyboardHeight = useRef(1000);
   const keypadOffset = useSharedValue(1000);
@@ -341,7 +341,7 @@ const BuildQuote = () => {
       setAmountNumber(valueAsNumber);
       if (isSell) {
         setAmountBNMinimalUnit(
-          toTokenMinimalUnit(`${value}`, selectedAsset?.decimals ?? 0) as BN,
+          toTokenMinimalUnit(`${value}`, selectedAsset?.decimals ?? 0) as BN4,
         );
       }
     },
@@ -356,8 +356,8 @@ const BuildQuote = () => {
       } else {
         const percentage = value * 100;
         const amountPercentage = balanceBN
-          ?.mul(new BN(percentage))
-          .div(new BN(100));
+          ?.mul(new BN4(percentage))
+          .div(new BN4(100));
 
         if (!amountPercentage) {
           return;
@@ -698,7 +698,7 @@ const BuildQuote = () => {
         value: quickAmount,
         label: currentFiatCurrency?.denomSymbol + quickAmount.toString(),
       })) ?? [];
-  } else if (balanceBN && !balanceBN.isZero() && maxSellAmount?.gt(new BN(0))) {
+  } else if (balanceBN && !balanceBN.isZero() && maxSellAmount?.gt(new BN4(0))) {
     quickAmounts = [
       { value: 0.25, label: '25%' },
       { value: 0.5, label: '50%' },
diff --git a/app/components/UI/Ramp/Views/SendTransaction/SendTransaction.tsx b/app/components/UI/Ramp/Views/SendTransaction/SendTransaction.tsx
index ac4927aa503..a0197dad4a2 100644
--- a/app/components/UI/Ramp/Views/SendTransaction/SendTransaction.tsx
+++ b/app/components/UI/Ramp/Views/SendTransaction/SendTransaction.tsx
@@ -2,7 +2,7 @@ import React, { useCallback, useEffect, useMemo, useState } from 'react';
 import { ImageSourcePropType, View } from 'react-native';
 import { useDispatch, useSelector } from 'react-redux';
 import { useNavigation } from '@react-navigation/native';
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 import { SellOrder } from '@consensys/on-ramp-sdk/dist/API';
 import {
   TransactionParams,
@@ -132,7 +132,7 @@ function SendTransaction() {
       setIsConfirming(true);
       let transactionParams: TransactionParams;
       const amount = addHexPrefix(
-        new BN(
+        new BN4(
           toTokenMinimalUnit(
             orderData.cryptoAmount || '0',
             orderData.cryptoCurrency.decimals,
diff --git a/app/components/UI/Ramp/hooks/useBalance.ts b/app/components/UI/Ramp/hooks/useBalance.ts
index 4c2e52afecb..93d9ee02ff8 100644
--- a/app/components/UI/Ramp/hooks/useBalance.ts
+++ b/app/components/UI/Ramp/hooks/useBalance.ts
@@ -1,5 +1,4 @@
 import { useSelector } from 'react-redux';
-import { hexToBN } from '@metamask/controller-utils';
 import { NATIVE_ADDRESS } from '../../../../constants/on-ramp';
 import { selectAccountsByChainId } from '../../../../selectors/accountTrackerController';
 import {
@@ -13,6 +12,7 @@ import { selectChainId } from '../../../../selectors/networkController';
 import { safeToChecksumAddress } from '../../../../util/address';
 import {
   balanceToFiat,
+  hexToBN,
   renderFromTokenMinimalUnit,
   renderFromWei,
   toHexadecimal,
diff --git a/app/components/UI/Ramp/hooks/useGasPriceEstimation.ts b/app/components/UI/Ramp/hooks/useGasPriceEstimation.ts
index 6c9565b94f6..f0c6b69ad82 100644
--- a/app/components/UI/Ramp/hooks/useGasPriceEstimation.ts
+++ b/app/components/UI/Ramp/hooks/useGasPriceEstimation.ts
@@ -5,7 +5,7 @@ import {
   type GasFeeController as GasFeeControllerType,
 } from '@metamask/gas-fee-controller';
 
-import { BN } from 'ethereumjs-util';
+import BN from 'bnjs4';
 import Engine from '../../../../core/Engine';
 import { decGWEIToHexWEI } from '../../../../util/conversions';
 import { selectGasFeeControllerState } from '../../../../selectors/gasFeeController';
diff --git a/app/components/UI/Ramp/hooks/useIntentAmount.ts b/app/components/UI/Ramp/hooks/useIntentAmount.ts
index 7b024731c3d..6a084053c3a 100644
--- a/app/components/UI/Ramp/hooks/useIntentAmount.ts
+++ b/app/components/UI/Ramp/hooks/useIntentAmount.ts
@@ -1,5 +1,5 @@
 import { useEffect } from 'react';
-import { type BN } from 'ethereumjs-util';
+import type BN4 from 'bnjs4';
 import { useRampSDK } from '../sdk';
 import parseAmount from '../utils/parseAmount';
 import { toTokenMinimalUnit } from '../../../../util/number';
@@ -21,7 +21,7 @@ export default function useIntentAmount(
   setAmount: (amount: React.SetStateAction<string>) => void,
   setAmountNumber: (amount: React.SetStateAction<number>) => void,
   setAmountBNMinimalUnit: (
-    amount: React.SetStateAction<BN | undefined>,
+    amount: React.SetStateAction<BN4 | undefined>,
   ) => void,
   currentFiatCurrency: FiatCurrency | null,
 ) {
@@ -53,7 +53,7 @@ export default function useIntentAmount(
               toTokenMinimalUnit(
                 `${parsedAmount}`,
                 selectedAsset?.decimals ?? 0,
-              ) as BN,
+              ) as BN4,
             );
           }
         }
diff --git a/app/components/UI/Stake/components/StakingBalance/StakingBalance.tsx b/app/components/UI/Stake/components/StakingBalance/StakingBalance.tsx
index e70630ab901..1f5dd15f15f 100644
--- a/app/components/UI/Stake/components/StakingBalance/StakingBalance.tsx
+++ b/app/components/UI/Stake/components/StakingBalance/StakingBalance.tsx
@@ -24,7 +24,7 @@ import { strings } from '../../../../../../locales/i18n';
 import { renderFromWei } from '../../../../../util/number';
 import { getTimeDifferenceFromNow } from '../../../../../util/date';
 import { filterExitRequests } from './utils';
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 import bn from 'bignumber.js';
 import {
   CommonPercentageInputUnits,
@@ -82,8 +82,8 @@ const StakingBalanceContent = ({ asset }: StakingBalanceProps) => {
       renderFromWei(
         claimableRequests.reduce(
           (acc, { claimedAssets }) =>
-            claimedAssets ? acc.add(new BN(claimedAssets)) : acc,
-          new BN(0),
+            claimedAssets ? acc.add(new BN4(claimedAssets)) : acc,
+          new BN4(0),
         ),
       ),
     [claimableRequests],
diff --git a/app/components/UI/Stake/hooks/useInputHandler.ts b/app/components/UI/Stake/hooks/useInputHandler.ts
index 881b4678e79..ac551c07147 100644
--- a/app/components/UI/Stake/hooks/useInputHandler.ts
+++ b/app/components/UI/Stake/hooks/useInputHandler.ts
@@ -1,4 +1,4 @@
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 import { useState, useMemo, useCallback } from 'react';
 import { useSelector } from 'react-redux';
 import {
@@ -15,19 +15,19 @@ import {
 import { strings } from '../../../../../locales/i18n';
 
 interface InputHandlerParams {
-  balance: BN;
+  balance: BN4;
 }
 
 const useInputHandler = ({ balance }: InputHandlerParams) => {
   const [amountEth, setAmountEth] = useState('0');
-  const [amountWei, setAmountWei] = useState<BN>(new BN(0));
+  const [amountWei, setAmountWei] = useState<BN4>(new BN4(0));
   const [fiatAmount, setFiatAmount] = useState('0');
   const [isEth, setIsEth] = useState<boolean>(true);
 
   const currentCurrency = useSelector(selectCurrentCurrency);
   const conversionRate = useSelector(selectConversionRate) || 1;
 
-  const isNonZeroAmount = useMemo(() => amountWei.gt(new BN(0)), [amountWei]);
+  const isNonZeroAmount = useMemo(() => amountWei.gt(new BN4(0)), [amountWei]);
 
   const isOverMaximum = useMemo(
     () => amountWei.gt(balance),
@@ -90,7 +90,7 @@ const useInputHandler = ({ balance }: InputHandlerParams) => {
   const handleAmountPress = useCallback(
     ({ value }: { value: number }) => {
       const percentage = value * 100;
-      const amountPercentage = balance.mul(new BN(percentage)).div(new BN(100));
+      const amountPercentage = balance.mul(new BN4(percentage)).div(new BN4(100));
 
       let newEthAmount;
       try {
@@ -112,7 +112,7 @@ const useInputHandler = ({ balance }: InputHandlerParams) => {
   );
 
   const handleMaxInput = useCallback(
-    (maxStakeableWei: BN) => {
+    (maxStakeableWei: BN4) => {
       setAmountWei(maxStakeableWei);
 
       let ethValue;
diff --git a/app/components/UI/Stake/hooks/useStakingGasFee.test.tsx b/app/components/UI/Stake/hooks/useStakingGasFee.test.tsx
index 8c972717182..85439c65a3b 100644
--- a/app/components/UI/Stake/hooks/useStakingGasFee.test.tsx
+++ b/app/components/UI/Stake/hooks/useStakingGasFee.test.tsx
@@ -2,7 +2,7 @@ import { act, waitFor } from '@testing-library/react-native';
 import { renderHookWithProvider } from '../../../../util/test/renderWithProvider';
 import useStakingGasFee from './useStakingGasFee';
 import Engine from '../../../../core/Engine';
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 import { backgroundState } from '../../../../util/test/initial-root-state';
 import { createMockAccountsControllerState } from '../../../../util/test/accountsControllerTestUtils';
 
@@ -93,7 +93,7 @@ describe('useStakingGasFee', () => {
 
     expect(result.current.isLoadingStakingGasFee).toBe(true);
     expect(result.current.isStakingGasFeeError).toBe(false);
-    expect(result.current.estimatedGasFeeWei).toEqual(new BN(0));
+    expect(result.current.estimatedGasFeeWei).toEqual(new BN4(0));
   });
 
   it('should fetch gas limit and calculate gas fee correctly', async () => {
@@ -113,7 +113,7 @@ describe('useStakingGasFee', () => {
         '0x0000000000000000000000000000000000000000',
       );
       expect(result.current.estimatedGasFeeWei).toEqual(
-        new BN('5094922637614180'),
+        new BN4('5094922637614180'),
       );
     });
   });
@@ -132,7 +132,7 @@ describe('useStakingGasFee', () => {
 
     await waitFor(() => {
       expect(result.current.isStakingGasFeeError).toBe(true);
-      expect(result.current.estimatedGasFeeWei).toEqual(new BN(0));
+      expect(result.current.estimatedGasFeeWei).toEqual(new BN4(0));
     });
   });
 
diff --git a/app/components/UI/Stake/hooks/useStakingGasFee.ts b/app/components/UI/Stake/hooks/useStakingGasFee.ts
index 4d3111307f9..f41c22d1901 100644
--- a/app/components/UI/Stake/hooks/useStakingGasFee.ts
+++ b/app/components/UI/Stake/hooks/useStakingGasFee.ts
@@ -4,13 +4,13 @@ import { useSelector } from 'react-redux';
 import { selectSelectedInternalAccountChecksummedAddress } from '../../../../selectors/accountsController';
 import { GAS_ESTIMATE_TYPES } from '@metamask/gas-fee-controller';
 import { decGWEIToHexWEI } from '../../../../util/conversions';
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 import { formatEther } from 'ethers/lib/utils';
 import Engine from '../../../../core/Engine';
 import { hexToBN } from '../../../../util/number';
 
 interface StakingGasFee {
-  estimatedGasFeeWei: BN;
+  estimatedGasFeeWei: BN4;
   isLoadingStakingGasFee: boolean;
   isStakingGasFeeError: boolean;
   refreshGasValues: () => void;
@@ -28,7 +28,7 @@ const useStakingGasFee = (depositValueWei: string): StakingGasFee => {
     useState<boolean>(true);
   const [isStakingGasFeeError, setIsStakingGasFeeError] =
     useState<boolean>(false);
-  const [estimatedGasFeeWei, setEstimatedGasFeeWei] = useState<BN>(new BN(0));
+  const [estimatedGasFeeWei, setEstimatedGasFeeWei] = useState<BN4>(new BN4(0));
 
   const fetchDepositGasValues = useCallback(async () => {
     const { GasFeeController } = Engine.context;
diff --git a/app/components/UI/Stake/hooks/useStakingInput.ts b/app/components/UI/Stake/hooks/useStakingInput.ts
index 3193c1a7002..d34e65aa079 100644
--- a/app/components/UI/Stake/hooks/useStakingInput.ts
+++ b/app/components/UI/Stake/hooks/useStakingInput.ts
@@ -1,4 +1,4 @@
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 import { useState, useMemo, useCallback } from 'react';
 import {
   limitToMaximumDecimalPlaces,
@@ -38,14 +38,14 @@ const useStakingInputHandlers = () => {
     () =>
       !isStakingGasFeeError && balance.gt(estimatedGasFeeWei)
         ? balance.sub(estimatedGasFeeWei)
-        : new BN(0),
+        : new BN4(0),
 
     [balance, estimatedGasFeeWei, isStakingGasFeeError],
   );
 
   const isOverMaximum = useMemo(() => {
     const additionalFundsRequired = amountWei.sub(maxStakeableAmountWei);
-    return isNonZeroAmount && additionalFundsRequired.gt(new BN(0));
+    return isNonZeroAmount && additionalFundsRequired.gt(new BN4(0));
   }, [amountWei, isNonZeroAmount, maxStakeableAmountWei]);
 
   const { annualRewardRate, annualRewardRateDecimal, isLoadingVaultData } =
diff --git a/app/components/UI/Stake/hooks/useUnstakingInput.ts b/app/components/UI/Stake/hooks/useUnstakingInput.ts
index 8fb6bc229cf..540cf8b35fe 100644
--- a/app/components/UI/Stake/hooks/useUnstakingInput.ts
+++ b/app/components/UI/Stake/hooks/useUnstakingInput.ts
@@ -1,4 +1,4 @@
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 import useBalance from './useBalance';
 import useInputHandler from './useInputHandler';
 
@@ -22,7 +22,7 @@ const useUnstakingInputHandlers = () => {
     percentageOptions,
     handleAmountPress,
     currentCurrency,
-  } = useInputHandler({ balance: new BN(stakedBalanceWei) });
+  } = useInputHandler({ balance: new BN4(stakedBalanceWei) });
 
   const stakedBalanceValue = isEth
     ? formattedStakedBalanceETH
diff --git a/app/components/UI/Tokens/TokenList/PortfolioBalance/index.test.tsx b/app/components/UI/Tokens/TokenList/PortfolioBalance/index.test.tsx
index e1e1f694376..680d8184300 100644
--- a/app/components/UI/Tokens/TokenList/PortfolioBalance/index.test.tsx
+++ b/app/components/UI/Tokens/TokenList/PortfolioBalance/index.test.tsx
@@ -1,6 +1,6 @@
 import React from 'react';
 import { fireEvent } from '@testing-library/react-native';
-import { BN } from 'ethereumjs-util';
+import BN5 from 'bnjs5';
 import renderWithProvider from '../../../../../util/test/renderWithProvider';
 import { backgroundState } from '../../../../../util/test/initial-root-state';
 import AppConstants from '../../../../../../app/core/AppConstants';
@@ -70,9 +70,9 @@ const initialState = {
       },
       TokenBalancesController: {
         contractBalances: {
-          '0x00': new BN(2),
-          '0x01': new BN(2),
-          '0x02': new BN(0),
+          '0x00': new BN5(2),
+          '0x01': new BN5(2),
+          '0x02': new BN5(0),
         },
       },
     },
diff --git a/app/components/UI/Tokens/index.test.tsx b/app/components/UI/Tokens/index.test.tsx
index bea1653f8ad..a53f0c2bccc 100644
--- a/app/components/UI/Tokens/index.test.tsx
+++ b/app/components/UI/Tokens/index.test.tsx
@@ -2,7 +2,7 @@ import React from 'react';
 // eslint-disable-next-line @typescript-eslint/no-shadow
 import { fireEvent, waitFor } from '@testing-library/react-native';
 import Tokens from './';
-import { BN } from 'ethereumjs-util';
+import BN5 from 'bnjs5';
 import renderWithProvider from '../../../util/test/renderWithProvider';
 import { createStackNavigator } from '@react-navigation/stack';
 import { getAssetTestId } from '../../../../wdio/screen-objects/testIDs/Screens/WalletView.testIds';
@@ -110,9 +110,9 @@ const initialState = {
       },
       TokenBalancesController: {
         contractBalances: {
-          '0x00': new BN(2),
-          '0x01': new BN(2),
-          '0x02': new BN(0),
+          '0x00': new BN5(2),
+          '0x01': new BN5(2),
+          '0x02': new BN5(0),
         },
       },
     },
@@ -265,7 +265,7 @@ describe('Tokens', () => {
           },
           TokenBalancesController: {
             contractBalances: {
-              '0x02': new BN(1),
+              '0x02': new BN5(1),
             },
           },
         },
diff --git a/app/components/Views/confirmations/Approval/components/TransactionEditor/index.js b/app/components/Views/confirmations/Approval/components/TransactionEditor/index.js
index 5e607dfbef8..69863ccdfb1 100644
--- a/app/components/Views/confirmations/Approval/components/TransactionEditor/index.js
+++ b/app/components/Views/confirmations/Approval/components/TransactionEditor/index.js
@@ -9,7 +9,8 @@ import {
   renderFromWei,
   toHexadecimal,
 } from '../../../../../../util/number';
-import { isValidAddress, BN, addHexPrefix } from 'ethereumjs-util';
+import { isValidAddress, addHexPrefix } from 'ethereumjs-util';
+import BN from 'bnjs4';
 import { strings } from '../../../../../../../locales/i18n';
 import { connect } from 'react-redux';
 import { KeyboardAwareScrollView } from 'react-native-keyboard-aware-scroll-view';
diff --git a/app/components/Views/confirmations/SendFlow/Amount/index.js b/app/components/Views/confirmations/SendFlow/Amount/index.js
index f2bd09ddc3a..7b883765321 100644
--- a/app/components/Views/confirmations/SendFlow/Amount/index.js
+++ b/app/components/Views/confirmations/SendFlow/Amount/index.js
@@ -60,7 +60,6 @@ import CollectibleMedia from '../../../../UI/CollectibleMedia';
 import collectiblesTransferInformation from '../../../../../util/collectibles-transfer';
 import { strings } from '../../../../../../locales/i18n';
 import Device from '../../../../../util/device';
-import { BN } from 'ethereumjs-util';
 import { MetaMetricsEvents } from '../../../../../core/Analytics';
 import dismissKeyboard from 'react-native/Libraries/Utilities/dismissKeyboard';
 import NetworkMainAssetLogo from '../../../../UI/NetworkMainAssetLogo';
@@ -893,7 +892,7 @@ class Amount extends PureComponent {
       const balanceBN = hexToBN(accounts[selectedAddress].balance);
       const realMaxValue = balanceBN.sub(estimatedTotalGas);
       const maxValue =
-        balanceBN.isZero() || realMaxValue.isNeg() ? new BN(0) : realMaxValue;
+        balanceBN.isZero() || realMaxValue.isNeg() ? hexToBN('0x0') : realMaxValue;
       if (internalPrimaryCurrencyIsCrypto) {
         input = fromWei(maxValue);
       } else {
diff --git a/app/components/Views/confirmations/SendFlow/Confirm/validation.test.ts b/app/components/Views/confirmations/SendFlow/Confirm/validation.test.ts
index e9ed1b98278..8da1c4c3ac3 100644
--- a/app/components/Views/confirmations/SendFlow/Confirm/validation.test.ts
+++ b/app/components/Views/confirmations/SendFlow/Confirm/validation.test.ts
@@ -1,4 +1,4 @@
-import { BN } from 'ethereumjs-util';
+import BN from 'bnjs4';
 import { validateSufficientBalance, validateSufficientTokenBalance } from './validation';
 import { renderFromWei, hexToBN } from '../../../../../util/number';
 import {
diff --git a/app/components/Views/confirmations/SendFlow/Confirm/validation.ts b/app/components/Views/confirmations/SendFlow/Confirm/validation.ts
index 884c939441e..461ffd62e96 100644
--- a/app/components/Views/confirmations/SendFlow/Confirm/validation.ts
+++ b/app/components/Views/confirmations/SendFlow/Confirm/validation.ts
@@ -4,7 +4,7 @@ import {
   decodeTransferData,
 } from '../../../../../util/transactions';
 import { strings } from '../../../../../../locales/i18n';
-import { BN } from 'ethereumjs-util';
+import type BN4 from 'bnjs4';
 
 interface SelectedAsset {
   address: string;
@@ -13,8 +13,8 @@ interface SelectedAsset {
 }
 
 export const generateInsufficientBalanceMessage = (
-  weiBalance: BN,
-  transactionValue: BN,
+  weiBalance: BN4,
+  transactionValue: BN4,
   ticker: string,
 ) => {
   const amount = renderFromWei(transactionValue.sub(weiBalance));
@@ -25,7 +25,7 @@ export const generateInsufficientBalanceMessage = (
   });
 };
 
-export const validateBalance = (weiBalance: BN, transactionValue: BN) =>
+export const validateBalance = (weiBalance: BN4, transactionValue: BN4) =>
   !weiBalance.gte(transactionValue) || weiBalance.isZero();
 
 export const validateSufficientTokenBalance = (
@@ -49,8 +49,8 @@ export const validateSufficientTokenBalance = (
 };
 
 export const validateSufficientBalance = (
-  weiBalance: BN,
-  totalTransactionValue: BN,
+  weiBalance: BN4,
+  totalTransactionValue: BN4,
   ticker: string,
 ) => {
   if (validateBalance(weiBalance, totalTransactionValue)) {
diff --git a/app/components/hooks/useAddressBalance/useAddressBalance.test.tsx b/app/components/hooks/useAddressBalance/useAddressBalance.test.tsx
index f3f8592d8a8..769ce5db067 100644
--- a/app/components/hooks/useAddressBalance/useAddressBalance.test.tsx
+++ b/app/components/hooks/useAddressBalance/useAddressBalance.test.tsx
@@ -8,7 +8,7 @@ import { Asset } from './useAddressBalance.types';
 import useAddressBalance from './useAddressBalance';
 import backgroundState from '../../../util/test/initial-root-state';
 import { createMockAccountsControllerState } from '../../../util/test/accountsControllerTestUtils';
-import { BN } from 'ethereumjs-util';
+import type BN5 from 'bnjs5';
 const MOCK_ADDRESS_1 = '0x0';
 const MOCK_ADDRESS_2 = '0x1';
 
@@ -65,7 +65,7 @@ describe('useAddressBalance', () => {
     address: string,
     selectedAddress: string,
     networkClientId?: string | undefined,
-  ) => Promise<BN>;
+  ) => Promise<BN5>;
   beforeEach(() => {
     mockGetERC20BalanceOf = jest
       .fn()
diff --git a/app/components/hooks/useAddressBalance/useAddressBalance.ts b/app/components/hooks/useAddressBalance/useAddressBalance.ts
index af95e0187e3..dcdf9e1acc5 100644
--- a/app/components/hooks/useAddressBalance/useAddressBalance.ts
+++ b/app/components/hooks/useAddressBalance/useAddressBalance.ts
@@ -1,6 +1,7 @@
 import { ERC1155, ERC721 } from '@metamask/controller-utils';
 import { useEffect, useState } from 'react';
 import { useSelector } from 'react-redux';
+import BN4 from 'bnjs4';
 
 import Engine from '../../../core/Engine';
 import { getTicker } from '../../../util/transactions';
@@ -110,7 +111,8 @@ const useAddressBalance = (
               address,
             );
             fromAccBalance = `${renderFromTokenMinimalUnit(
-              fromAccBalance || '0',
+              // This is to work around incompatibility between bn.js v4/v5 - should be removed when migration to v5 is complete
+              new BN4(fromAccBalance?.toString(10) || '0', 10),
               decimals,
             )} ${symbol}`;
             setAddressBalance(fromAccBalance);
diff --git a/app/components/hooks/useTokenBalance.tsx b/app/components/hooks/useTokenBalance.tsx
index 8962c9ce352..f4d84786a61 100644
--- a/app/components/hooks/useTokenBalance.tsx
+++ b/app/components/hooks/useTokenBalance.tsx
@@ -1,6 +1,6 @@
 import { useState, useEffect, Dispatch, SetStateAction } from 'react';
 import Engine from '../../core/Engine';
-import { BN } from 'ethereumjs-util';
+import type BN4 from 'bnjs4';
 
 /**
  * Hook to handle the balance of ERC20 tokens
@@ -12,12 +12,12 @@ import { BN } from 'ethereumjs-util';
 const useTokenBalance = (
   requestedTokenAddress: string,
   userCurrentAddress: string,
-): [BN | null, boolean, boolean] => {
+): [BN4 | null, boolean, boolean] => {
   // This hook should be only used with ERC20 tokens
   const [tokenBalance, setTokenBalance]: [
-    BN | null,
-    Dispatch<SetStateAction<BN | null>>,
-  ] = useState<BN | null>(null);
+    BN4 | null,
+    Dispatch<SetStateAction<BN4 | null>>,
+  ] = useState<BN4 | null>(null);
   const [loading, setLoading]: [boolean, Dispatch<SetStateAction<boolean>>] =
     useState<boolean>(true);
   const [error, setError]: [boolean, Dispatch<SetStateAction<boolean>>] =
@@ -31,7 +31,7 @@ const useTokenBalance = (
     userAddress: string,
   ): Promise<void> => {
     AssetsContractController.getERC20BalanceOf(tokenAddress, userAddress)
-      .then((balance: BN) => setTokenBalance(balance))
+      .then((balance: BN4) => setTokenBalance(balance))
       .catch(() => setError(true))
       .finally(() => setLoading(false));
   };
diff --git a/app/components/hooks/useTokenBalancesController/useTokenBalancesController.test.tsx b/app/components/hooks/useTokenBalancesController/useTokenBalancesController.test.tsx
index b575c66c4cc..aaf33d56db3 100644
--- a/app/components/hooks/useTokenBalancesController/useTokenBalancesController.test.tsx
+++ b/app/components/hooks/useTokenBalancesController/useTokenBalancesController.test.tsx
@@ -4,7 +4,7 @@ import { Provider } from 'react-redux';
 import { createStore, Store } from 'redux';
 import { act, render, waitFor } from '@testing-library/react-native';
 import useTokenBalancesController from './useTokenBalancesController';
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 import { cloneDeep } from 'lodash';
 import { backgroundState } from '../../../util/test/initial-root-state';
 
@@ -15,7 +15,7 @@ const mockInitialState = {
       ...backgroundState,
       TokenBalancesController: {
         contractBalances: {
-          '0x326836cc6cd09B5aa59B81A7F72F25FcC0136b95': new BN(0x2a),
+          '0x326836cc6cd09B5aa59B81A7F72F25FcC0136b95': new BN4(0x2a),
         },
       },
     },
@@ -104,7 +104,7 @@ describe('useTokenBalancesController()', () => {
       testStore.dispatch({
         type: 'add-balances',
         value: {
-          '0x326836cc6cd09B5aa59B81A7F72F25FcC0136b96': new BN(0x539),
+          '0x326836cc6cd09B5aa59B81A7F72F25FcC0136b96': new BN4(0x539),
         },
       });
     });
@@ -122,7 +122,7 @@ describe('useTokenBalancesController()', () => {
       testStore.dispatch({
         type: 'add-balances',
         value: {
-          '0x326836cc6cd09B5aa59B81A7F72F25FcC0136b95': new BN(0x2a),
+          '0x326836cc6cd09B5aa59B81A7F72F25FcC0136b95': new BN4(0x2a),
         },
       });
     });
diff --git a/app/constants/transaction.ts b/app/constants/transaction.ts
index 92bde7b1648..38612646e43 100644
--- a/app/constants/transaction.ts
+++ b/app/constants/transaction.ts
@@ -1,4 +1,4 @@
-import { BN } from 'ethereumjs-util';
+import BN from 'bnjs4';
 
 // Transaction Status
 export const TX_UNAPPROVED = 'unapproved';
diff --git a/app/store/migrations/029.ts b/app/store/migrations/029.ts
index af4f1ebf1ba..28f56e47092 100644
--- a/app/store/migrations/029.ts
+++ b/app/store/migrations/029.ts
@@ -2,7 +2,6 @@ import { toHex } from '@metamask/controller-utils';
 import { Hex, hasProperty, isObject } from '@metamask/utils';
 import { regex } from '../../../app/util/regex';
 
-//@ts-expect-error - This error is expected, but ethereumjs-util exports this function
 import { isHexString } from 'ethereumjs-util';
 import { TransactionParams } from '@metamask/transaction-controller';
 import { captureException } from '@sentry/react-native';
@@ -466,7 +465,7 @@ export default async function migrate(stateAsync: unknown) {
   if (Array.isArray(transactionControllerState.transactions)) {
     transactionControllerState.transactions.forEach(
       (transaction: TransactionParams, index: number) => {
-        if (transaction && !isHexString(transaction.chainId)) {
+        if (transaction && (!transaction.chainId || (transaction.chainId && !isHexString(transaction.chainId)))) {
           if (
             Array.isArray(transactionControllerState.transactions) &&
             isObject(transactionControllerState.transactions[index])
diff --git a/app/store/migrations/031.ts b/app/store/migrations/031.ts
index ba4b06ca119..0ad5dcdf64e 100644
--- a/app/store/migrations/031.ts
+++ b/app/store/migrations/031.ts
@@ -6,7 +6,6 @@ import {
   TokensControllerState,
 } from '@metamask/assets-controllers';
 import { toHex } from '@metamask/controller-utils';
-//@ts-expect-error - This error is expected, but ethereumjs-util exports this function
 import { isHexString } from 'ethereumjs-util';
 
 /**
diff --git a/app/util/address/index.ts b/app/util/address/index.ts
index 34071c0579a..10c09ebae63 100644
--- a/app/util/address/index.ts
+++ b/app/util/address/index.ts
@@ -3,7 +3,6 @@ import {
   isValidAddress,
   addHexPrefix,
   isValidChecksumAddress,
-  //@ts-expect-error - This error is expected, but ethereumjs-util exports this function
   isHexPrefixed,
 } from 'ethereumjs-util';
 import punycode from 'punycode/punycode';
diff --git a/app/util/confirmation/transactions.test.ts b/app/util/confirmation/transactions.test.ts
index 1c124ff1fd6..1bda3144e94 100644
--- a/app/util/confirmation/transactions.test.ts
+++ b/app/util/confirmation/transactions.test.ts
@@ -1,4 +1,4 @@
-import { BN } from 'ethereumjs-util';
+import BN from 'bnjs4';
 import { buildTransactionParams } from './transactions';
 import { GAS_ESTIMATE_TYPES } from '@metamask/gas-fee-controller';
 import { TransactionEnvelopeType } from '@metamask/transaction-controller';
diff --git a/app/util/conversion/index.js b/app/util/conversion/index.js
index 4046c727724..d65cb685397 100644
--- a/app/util/conversion/index.js
+++ b/app/util/conversion/index.js
@@ -22,8 +22,9 @@
  */
 
 import BigNumber from 'bignumber.js';
+import BN from 'bnjs4';
 
-import { stripHexPrefix, BN } from 'ethereumjs-util';
+import { stripHexPrefix } from 'ethereumjs-util';
 
 // Big Number Constants
 const BIG_NUMBER_WEI_MULTIPLIER = new BigNumber('1000000000000000000');
diff --git a/app/util/custom-gas/index.js b/app/util/custom-gas/index.js
index 3583b88fab3..b8c611c6be9 100644
--- a/app/util/custom-gas/index.js
+++ b/app/util/custom-gas/index.js
@@ -1,4 +1,4 @@
-import { BN } from 'ethereumjs-util';
+import BN from 'bnjs4';
 import { renderFromWei, weiToFiat, toWei, conversionUtil } from '../number';
 import { strings } from '../../../locales/i18n';
 import TransactionTypes from '../../core/TransactionTypes';
diff --git a/app/util/dappTransactions/index.test.ts b/app/util/dappTransactions/index.test.ts
index f4c625d0518..150e559b98d 100644
--- a/app/util/dappTransactions/index.test.ts
+++ b/app/util/dappTransactions/index.test.ts
@@ -1,4 +1,4 @@
-import { BN } from 'ethereumjs-util';
+import BN from 'bnjs4';
 
 import { strings } from '../../../locales/i18n';
 import Engine from '../../core/Engine';
diff --git a/app/util/dappTransactions/index.ts b/app/util/dappTransactions/index.ts
index d2d93d8fd74..62f438f291a 100644
--- a/app/util/dappTransactions/index.ts
+++ b/app/util/dappTransactions/index.ts
@@ -1,11 +1,11 @@
+import { remove0x } from '@metamask/utils';
 import { isBN, hexToBN } from '../number';
 import { safeToChecksumAddress } from '../address';
 import Engine from '../../core/Engine';
 import TransactionTypes from '../../core/TransactionTypes';
 import { toLowerCaseEquals } from '../general';
 import { strings } from '../../../locales/i18n';
-import { BN } from 'ethereumjs-util';
-import { lt } from '../lodash';
+import BN4 from 'bnjs4';
 import { estimateGas as controllerEstimateGas } from '../transaction-controller';
 
 interface opts {
@@ -25,8 +25,8 @@ interface Transaction {
   data: string;
   ensRecipient: string | undefined;
   from: string;
-  gas: BN;
-  gasPrice: BN;
+  gas: BN4;
+  gasPrice: BN4;
   id: string;
   nonce: string | undefined;
   origin: string;
@@ -97,7 +97,7 @@ export const estimateGas = async (
  * @returns {string} - String containing error message whether the Ether transaction amount is valid or not
  */
 export const validateEtherAmount = (
-  value: BN,
+  value: BN4,
   from: string,
   allowEmpty = true,
 ): string | undefined => {
@@ -115,6 +115,32 @@ interface ContractBalances {
   [key: string]: string;
 }
 
+const getTokenBalance = async (
+  from: string,
+  selectedAsset: SelectedAsset,
+  selectedAddress: string,
+  contractBalances: ContractBalances,
+): Promise<BN4 | undefined> => {
+  const checksummedFrom = safeToChecksumAddress(from) || '';
+  if (selectedAddress === from && contractBalances[selectedAsset.address]) {
+    return hexToBN(
+      remove0x(contractBalances[selectedAsset.address].toString()),
+    );
+  }
+  try {
+    const { AssetsContractController } = Engine.context;
+    // TODO: Roundtrip string conversion can be removed when bn.js v4 is superseded with v5
+    const contractBalanceForAddress = await AssetsContractController.getERC20BalanceOf(
+        selectedAsset.address,
+        checksummedFrom,
+      );
+    const contractBalanceForAddressBN = hexToBN(contractBalanceForAddress.toString(16));
+    return contractBalanceForAddressBN;
+  } catch (e) {
+    // Don't validate balance if error
+  }
+};
+
 /**
  * Validates asset (ERC20) transaction amount
  *
@@ -122,8 +148,8 @@ interface ContractBalances {
  * @returns {string} - String containing error message whether the Ether transaction amount is valid or not
  */
 export const validateTokenAmount = async (
-  value: BN,
-  gas: BN,
+  value: BN4,
+  gas: BN4,
   from: string,
   selectedAsset: SelectedAsset,
   selectedAddress: string,
@@ -131,7 +157,6 @@ export const validateTokenAmount = async (
   allowEmpty = true,
 ): Promise<string | undefined> => {
   if (!allowEmpty) {
-    const checksummedFrom = safeToChecksumAddress(from) || '';
 
     if (!value) {
       return strings('transaction.invalid_amount');
@@ -144,33 +169,15 @@ export const validateTokenAmount = async (
     if (!from) {
       return strings('transaction.invalid_from_address');
     }
-    // If user trying to send a token that doesn't own, validate balance querying contract
-    // If it fails, skip validation
-    let contractBalanceForAddress: BN | undefined | number;
-    if (selectedAddress === from && contractBalances[selectedAsset.address]) {
-      contractBalanceForAddress = hexToBN(
-        contractBalances[selectedAsset.address].toString(),
-      );
-    } else {
-      try {
-        const { AssetsContractController } = Engine.context;
-        contractBalanceForAddress =
-          await AssetsContractController.getERC20BalanceOf(
-            selectedAsset.address,
-            checksummedFrom,
-          );
-      } catch (e) {
-        // Don't validate balance if error
-      }
+
+    if (value && !isBN(value)) {
+      return strings('transaction.invalid_amount');
+    }
+
+    const contractBalanceForAddress = await getTokenBalance(from, selectedAsset, selectedAddress, contractBalances);
+    if (contractBalanceForAddress?.lt(value)) {
+      return strings('transaction.insufficient');
     }
-    if (value && !isBN(value)) return strings('transaction.invalid_amount');
-    const validateAssetAmount =
-      contractBalanceForAddress &&
-      lt(
-        contractBalanceForAddress as unknown as number,
-        value as unknown as number,
-      );
-    if (validateAssetAmount) return strings('transaction.insufficient');
   }
 };
 
@@ -216,10 +223,10 @@ export const validateAmount = async (
   const { value, from, gas, selectedAsset } = transaction;
 
   const validations: Validations = {
-    ETH: () => validateEtherAmount(value as unknown as BN, from, allowEmpty),
+    ETH: () => validateEtherAmount(value as unknown as BN4, from, allowEmpty),
     ERC20: async () =>
       await validateTokenAmount(
-        value as unknown as BN,
+        value as unknown as BN4,
         gas,
         from,
         selectedAsset,
@@ -276,8 +283,8 @@ type setTransactionObjectType = (
  * @param {function} setTransactionObject - Sets any attribute in transaction object
  */
 export const handleGasFeeSelection = (
-  gasLimit: BN,
-  gasPrice: BN,
+  gasLimit: BN4,
+  gasPrice: BN4,
   setTransactionObject: setTransactionObjectType,
 ): void => {
   const transactionObject = {
@@ -297,5 +304,5 @@ export const handleGetGasLimit = async (
 ): Promise<void> => {
   if (!Object.keys(transaction.selectedAsset).length) return;
   const { gas } = await estimateGas({}, transaction);
-  setTransactionObject({ gas: hexToBN(gas) as BN });
+  setTransactionObject({ gas: hexToBN(gas) as BN4 });
 };
diff --git a/app/util/number/index.js b/app/util/number/index.js
index 28027c52b7a..c3a76e42206 100644
--- a/app/util/number/index.js
+++ b/app/util/number/index.js
@@ -1,20 +1,17 @@
 /**
  * Collection of utility functions for consistent formatting and conversion
  */
-import { BN, stripHexPrefix } from 'ethereumjs-util';
+import { stripHexPrefix } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
 import { utils as ethersUtils } from 'ethers';
 import convert from '@metamask/ethjs-unit';
-import {
-  BNToHex,
-  hexToBN as controllerHexToBN,
-} from '@metamask/controller-utils';
+import { add0x, remove0x } from '@metamask/utils';
 import numberToBN from 'number-to-bn';
 import BigNumber from 'bignumber.js';
 
 import currencySymbols from '../currency-symbols.json';
 import { isZero } from '../lodash';
 import { regex } from '../regex';
-export { BNToHex };
 
 // Big Number Constants
 const BIG_NUMBER_WEI_MULTIPLIER = new BigNumber('1000000000000000000');
@@ -30,8 +27,20 @@ const BIG_NUMBER_ETH_MULTIPLIER = new BigNumber('1');
  */
 export const hexToBN = (inputHex) =>
   typeof inputHex !== 'string'
-    ? new BN(inputHex, 16)
-    : controllerHexToBN(inputHex);
+    ? new BN4(inputHex, 16)
+    : (inputHex ? new BN4(remove0x(inputHex), 16) : new BN4(0));
+
+/**
+ * Converts a BN object to a hex string with a '0x' prefix.
+ *
+ * @param inputBn - BN instance to convert to a hex string.
+ * @returns A '0x'-prefixed hex string.
+ */
+// TODO: Either fix this lint violation or explain why it's necessary to ignore.
+// eslint-disable-next-line @typescript-eslint/naming-convention
+export function BNToHex(inputBn) {
+  return add0x(inputBn.toString(16));
+}
 
 // Setter Maps
 const toBigNumber = {
@@ -55,7 +64,7 @@ const toSpecifiedDenomination = {
 const baseChange = {
   hex: (n) => n.toString(16),
   dec: (n) => new BigNumber(n).toString(10),
-  BN: (n) => new BN(n.toString(16)),
+  BN: (n) => new BN4(n.toString(16)),
 };
 
 /**
@@ -107,7 +116,7 @@ export function fromTokenMinimalUnit(
   minimalInput = isRounding ? Number(minimalInput) : minimalInput;
   const prefixedInput = addHexPrefix(minimalInput.toString(16));
   let minimal = safeNumberToBN(prefixedInput);
-  const negative = minimal.lt(new BN(0));
+  const negative = minimal.lt(new BN4(0));
   const base = toBN(Math.pow(10, decimals).toString());
 
   if (negative) {
@@ -151,7 +160,7 @@ export function fromTokenMinimalUnitString(minimalInput, decimals) {
 /**
  * Converts some unit to token minimal unit
  *
- * @param {number|string|BN} tokenValue - Value to convert
+ * @param {number|string|BN4} tokenValue - Value to convert
  * @param {number} decimals - Unit to convert from, ether by default
  * @returns {Object} - BN instance containing the new number
  */
@@ -196,19 +205,19 @@ export function toTokenMinimalUnit(tokenValue, decimals) {
   while (fraction.length < decimals) {
     fraction += '0';
   }
-  whole = new BN(whole);
-  fraction = new BN(fraction);
+  whole = new BN4(whole);
+  fraction = new BN4(fraction);
   let tokenMinimal = whole.mul(base).add(fraction);
   if (negative) {
     tokenMinimal = tokenMinimal.mul(negative);
   }
-  return new BN(tokenMinimal.toString(10), 10);
+  return new BN4(tokenMinimal.toString(10), 10);
 }
 
 /**
  * Converts some token minimal unit to render format string, showing 5 decimals
  *
- * @param {Number|String|BN} tokenValue - Token value to convert
+ * @param {Number|String|BN4} tokenValue - Token value to convert
  * @param {Number} decimals - Token decimals to convert
  * @param {Number} decimalsToShow - Decimals to 5
  * @returns {String} - Number of token minimal unit, in render format
@@ -304,7 +313,7 @@ export function fiatNumberToTokenMinimalUnit(
 /**
  * Converts wei to render format string, showing 5 decimals
  *
- * @param {Number|String|BN} value - Wei to convert
+ * @param {Number|String|BN4} value - Wei to convert
  * @param {Number} decimalsToShow - Decimals to 5
  * @returns {String} - Number of token minimal unit, in render format
  * If value is less than 5 precision decimals will show '< 0.00001'
@@ -343,7 +352,7 @@ export function calcTokenValueToSend(value, decimals) {
  * @returns {boolean} - True if the value is a BN instance
  */
 export function isBN(value) {
-  return BN.isBN(value);
+  return BN4.isBN(value);
 }
 
 /**
@@ -367,7 +376,7 @@ export function isDecimal(value) {
  * @returns {Object} - BN instance
  */
 export function toBN(value) {
-  return new BN(value);
+  return new BN4(value);
 }
 
 /**
@@ -408,9 +417,9 @@ export const isNumberScientificNotationWhenString = (value) => {
 /**
  * Converts some unit to wei
  *
- * @param {number|string|BN} value - Value to convert
+ * @param {number|string|BN4} value - Value to convert
  * @param {string} unit - Unit to convert from, ether by default
- * @returns {BN} - BN instance containing the new number
+ * @returns {BN4} - BN instance containing the new number
  */
 export function toWei(value, unit = 'ether') {
   // check the posibilty to convert to BN
@@ -424,7 +433,7 @@ export function toWei(value, unit = 'ether') {
 /**
  * Converts some unit to Gwei
  *
- * @param {number|string|BN} value - Value to convert
+ * @param {number|string|BN4} value - Value to convert
  * @param {string} unit - Unit to convert from, ether by default
  * @returns {Object} - BN instance containing the new number
  */
@@ -435,7 +444,7 @@ export function toGwei(value, unit = 'ether') {
 /**
  * Converts some unit to Gwei and return it in render format
  *
- * @param {number|string|BN} value - Value to convert
+ * @param {number|string|BN4} value - Value to convert
  * @param {string} unit - Unit to convert from, ether by default
  * @returns {string} - String instance containing the renderable number
  */
@@ -450,7 +459,7 @@ export function renderToGwei(value, unit = 'ether') {
  * Converts wei expressed as a BN instance into a human-readable fiat string
  * TODO: wei should be a BN instance, but we're not sure if it's always the case
 //
- * @param {number | BN} wei - BN corresponding to an amount of wei
+ * @param {number | BN4} wei - BN corresponding to an amount of wei
  * @param {number | null} conversionRate - ETH to current currency conversion rate
  * @param {string} currencyCode - Current currency code to display
  * @returns {string} - Currency-formatted string
@@ -528,7 +537,7 @@ export function addCurrencySymbol(
 /**
  * Converts wei expressed as a BN instance into a human-readable fiat string
  *
- * @param {number|string|BN} wei - BN corresponding to an amount of wei
+ * @param {number|string|BN4} wei - BN corresponding to an amount of wei
  * @param {number} conversionRate - ETH to current currency conversion rate
  * @param {Number} decimalsToShow - Decimals to 5
  * @returns {Number} - The converted balance
diff --git a/app/util/number/index.test.ts b/app/util/number/index.test.ts
index 436f18c0c29..db8904ef7a9 100644
--- a/app/util/number/index.test.ts
+++ b/app/util/number/index.test.ts
@@ -1,4 +1,5 @@
-import { BN } from 'ethereumjs-util';
+import BN4 from 'bnjs4';
+import BN5 from 'bnjs5';
 
 import {
   addCurrencySymbol,
@@ -39,7 +40,7 @@ import {
 
 describe('Number utils :: BNToHex', () => {
   it('BNToHex', () => {
-    expect(BNToHex(new BN('1337'))).toEqual('0x539');
+    expect(BNToHex(new BN5('1337'))).toEqual('0x539');
   });
 });
 
@@ -53,7 +54,7 @@ describe('Number utils :: fromWei', () => {
   });
 
   it('fromWei using BN number', () => {
-    expect(fromWei(new BN('1337'))).toEqual('0.000000000000001337');
+    expect(fromWei(new BN4('1337'))).toEqual('0.000000000000001337');
   });
 });
 
@@ -87,19 +88,19 @@ describe('Number utils :: toWei', () => {
     expect(() => toWei('1.337e-15')).toThrow(Error);
   });
 
-  // bn.js do not support decimals, so tests here only cover integers
+  // bnjs4 do not support decimals, so tests here only cover integers
   it('toWei using BN number', () => {
-    expect(toWei(new BN(1337)).toString()).toEqual('1337000000000000000000');
+    expect(toWei(new BN4(1337)).toString()).toEqual('1337000000000000000000');
 
     // Tests for expected limitations of BN.js
 
     // BN.js do not support decimals
-    expect(toWei(new BN(1.337e-15)).toString()).toEqual('0');
+    expect(toWei(new BN4(1.337e-15)).toString()).toEqual('0');
     // BN.js do not support such big numbers
-    expect(() => toWei(new BN(1.337e18))).toThrow(Error);
-    expect(() => toWei(new BN(1337000000000000000))).toThrow(Error);
+    expect(() => toWei(new BN4(1.337e18))).toThrow(Error);
+    expect(() => toWei(new BN4(1337000000000000000))).toThrow(Error);
     // For some reason this returns 8338418000000000000000000 wei
-    expect(toWei(new BN('1.337e18'))).not.toEqual(
+    expect(toWei(new BN4('1.337e18'))).not.toEqual(
       '1337000000000000000000000000000000000',
     );
   });
@@ -119,9 +120,9 @@ describe('Number utils :: fromTokenMinimalUnit', () => {
   });
 
   it('fromTokenMinimalUnit using BN number', () => {
-    expect(fromTokenMinimalUnit(new BN('1337'), 6)).toEqual('0.001337');
-    expect(fromTokenMinimalUnit(new BN('1337'), 0)).toEqual('1337');
-    expect(fromTokenMinimalUnit(new BN('1337'), 18)).toEqual(
+    expect(fromTokenMinimalUnit(new BN4('1337'), 6)).toEqual('0.001337');
+    expect(fromTokenMinimalUnit(new BN4('1337'), 0)).toEqual('1337');
+    expect(fromTokenMinimalUnit(new BN4('1337'), 18)).toEqual(
       '0.000000000000001337',
     );
   });
@@ -134,24 +135,24 @@ describe('Number utils :: fromTokenMinimalUnit', () => {
   });
 
   it('rounds number by default', () => {
-    expect(fromTokenMinimalUnit(new BN('1000000000000000000'), 18)).toEqual(
+    expect(fromTokenMinimalUnit(new BN4('1000000000000000000'), 18)).toEqual(
       '1',
     );
-    expect(fromTokenMinimalUnit(new BN('10000000000000000000'), 18)).toEqual(
+    expect(fromTokenMinimalUnit(new BN4('10000000000000000000'), 18)).toEqual(
       '10',
     );
-    expect(fromTokenMinimalUnit(new BN('100000000000000000000'), 18)).toEqual(
+    expect(fromTokenMinimalUnit(new BN4('100000000000000000000'), 18)).toEqual(
       '100',
     );
-    expect(fromTokenMinimalUnit(new BN('1000000000000000000000'), 18)).toEqual(
+    expect(fromTokenMinimalUnit(new BN4('1000000000000000000000'), 18)).toEqual(
       '1000',
     );
-    expect(fromTokenMinimalUnit(new BN('10000000000000000000000'), 18)).toEqual(
+    expect(fromTokenMinimalUnit(new BN4('10000000000000000000000'), 18)).toEqual(
       '10000',
     );
 
     // test decimal greater than 30,000
-    expect(fromTokenMinimalUnit(new BN('50000000000000000000000'), 18)).toEqual(
+    expect(fromTokenMinimalUnit(new BN4('50000000000000000000000'), 18)).toEqual(
       '49999.999999999995805696',
     );
 
@@ -163,24 +164,24 @@ describe('Number utils :: fromTokenMinimalUnit', () => {
 
   it('does not round number if isRounding is false', () => {
     expect(
-      fromTokenMinimalUnit(new BN('1000000000000000000'), 18, false),
+      fromTokenMinimalUnit(new BN4('1000000000000000000'), 18, false),
     ).toEqual('1');
     expect(
-      fromTokenMinimalUnit(new BN('10000000000000000000'), 18, false),
+      fromTokenMinimalUnit(new BN4('10000000000000000000'), 18, false),
     ).toEqual('10');
     expect(
-      fromTokenMinimalUnit(new BN('100000000000000000000'), 18, false),
+      fromTokenMinimalUnit(new BN4('100000000000000000000'), 18, false),
     ).toEqual('100');
     expect(
-      fromTokenMinimalUnit(new BN('1000000000000000000000'), 18, false),
+      fromTokenMinimalUnit(new BN4('1000000000000000000000'), 18, false),
     ).toEqual('1000');
     expect(
-      fromTokenMinimalUnit(new BN('10000000000000000000000'), 18, false),
+      fromTokenMinimalUnit(new BN4('10000000000000000000000'), 18, false),
     ).toEqual('10000');
 
     // test decimal greater than 30,000
     expect(
-      fromTokenMinimalUnit(new BN('50000000000000000000000'), 18, false),
+      fromTokenMinimalUnit(new BN4('50000000000000000000000'), 18, false),
     ).toEqual('50000');
 
     // test decimal less than 1e-14
@@ -281,67 +282,67 @@ describe('Number utils :: fromTokenMinimalUnitString', () => {
   });
 
   it('fromTokenMinimalUnitString using BN number', () => {
-    expect(fromTokenMinimalUnitString(new BN('1337').toString(10), 6)).toEqual(
+    expect(fromTokenMinimalUnitString(new BN4('1337').toString(10), 6)).toEqual(
       '0.001337',
     );
-    expect(fromTokenMinimalUnitString(new BN('1337').toString(10), 0)).toEqual(
+    expect(fromTokenMinimalUnitString(new BN4('1337').toString(10), 0)).toEqual(
       '1337',
     );
-    expect(fromTokenMinimalUnitString(new BN('1337').toString(10), 18)).toEqual(
+    expect(fromTokenMinimalUnitString(new BN4('1337').toString(10), 18)).toEqual(
       '0.000000000000001337',
     );
-    expect(fromTokenMinimalUnitString(new BN('123456').toString(), 5)).toEqual(
+    expect(fromTokenMinimalUnitString(new BN4('123456').toString(), 5)).toEqual(
       '1.23456',
     );
-    expect(fromTokenMinimalUnitString(new BN('123456').toString(), 5)).toEqual(
+    expect(fromTokenMinimalUnitString(new BN4('123456').toString(), 5)).toEqual(
       '1.23456',
     );
     expect(
-      fromTokenMinimalUnitString(new BN('1234560000000000000').toString(), 18),
+      fromTokenMinimalUnitString(new BN4('1234560000000000000').toString(), 18),
     ).toEqual('1.23456');
     expect(
-      fromTokenMinimalUnitString(new BN('1000000000000000000').toString(), 18),
+      fromTokenMinimalUnitString(new BN4('1000000000000000000').toString(), 18),
     ).toEqual('1');
-    expect(fromTokenMinimalUnitString(new BN('1').toString(), 18)).toEqual(
+    expect(fromTokenMinimalUnitString(new BN4('1').toString(), 18)).toEqual(
       '0.000000000000000001',
     );
-    expect(fromTokenMinimalUnitString(new BN('0').toString(), 18)).toEqual('0');
+    expect(fromTokenMinimalUnitString(new BN4('0').toString(), 18)).toEqual('0');
     expect(
-      fromTokenMinimalUnitString(new BN('123456789').toString(), 5),
+      fromTokenMinimalUnitString(new BN4('123456789').toString(), 5),
     ).toEqual('1234.56789');
     expect(
       fromTokenMinimalUnitString(
-        new BN('1234567890000000000987654321').toString(),
+        new BN4('1234567890000000000987654321').toString(),
         18,
       ),
     ).toEqual('1234567890.000000000987654321');
     expect(
       fromTokenMinimalUnitString(
-        new BN('10000000000000000000000000000001').toString(),
+        new BN4('10000000000000000000000000000001').toString(),
         18,
       ),
     ).toEqual('10000000000000.000000000000000001');
     expect(
       fromTokenMinimalUnitString(
-        new BN('10000000000000000000000000000000').toString(),
+        new BN4('10000000000000000000000000000000').toString(),
         18,
       ),
     ).toEqual('10000000000000');
     expect(
-      fromTokenMinimalUnitString(new BN('3900229504248293869').toString(), 18),
+      fromTokenMinimalUnitString(new BN4('3900229504248293869').toString(), 18),
     ).toEqual('3.900229504248293869');
     expect(
       fromTokenMinimalUnitString(
-        new BN('92836465327282987373728723').toString(),
+        new BN4('92836465327282987373728723').toString(),
         18,
       ),
     ).toEqual('92836465.327282987373728723');
     expect(
-      fromTokenMinimalUnitString(new BN('6123512631253').toString(), 16),
+      fromTokenMinimalUnitString(new BN4('6123512631253').toString(), 16),
     ).toEqual('0.0006123512631253');
     expect(
       fromTokenMinimalUnitString(
-        new BN('92836465327282987373728723').toString(),
+        new BN4('92836465327282987373728723').toString(),
         0,
       ),
     ).toEqual('92836465327282987373728723');
@@ -350,20 +351,20 @@ describe('Number utils :: fromTokenMinimalUnitString', () => {
 
 describe('Number utils :: toTokenMinimalUnit', () => {
   it('toTokenMinimalUnit using number', () => {
-    expect(toTokenMinimalUnit(1337, 6)).toEqual(new BN('1337000000', 10));
-    expect(toTokenMinimalUnit(1337, 0)).toEqual(new BN('1337'));
-    expect(toTokenMinimalUnit(1337.1, 1)).toEqual(new BN('13371'));
+    expect(toTokenMinimalUnit(1337, 6)).toEqual(new BN4('1337000000', 10));
+    expect(toTokenMinimalUnit(1337, 0)).toEqual(new BN4('1337'));
+    expect(toTokenMinimalUnit(1337.1, 1)).toEqual(new BN4('13371'));
   });
 
   it('toTokenMinimalUnit using string', () => {
-    expect(toTokenMinimalUnit('1337', 6)).toEqual(new BN('1337000000'));
-    expect(toTokenMinimalUnit('1337', 0)).toEqual(new BN('1337'));
-    expect(toTokenMinimalUnit('1337.1', 2)).toEqual(new BN('133710'));
+    expect(toTokenMinimalUnit('1337', 6)).toEqual(new BN4('1337000000'));
+    expect(toTokenMinimalUnit('1337', 0)).toEqual(new BN4('1337'));
+    expect(toTokenMinimalUnit('1337.1', 2)).toEqual(new BN4('133710'));
   });
 
   it('toTokenMinimalUnit using BN number', () => {
-    expect(toTokenMinimalUnit(new BN('1337'), 0)).toEqual(new BN('1337'));
-    expect(toTokenMinimalUnit(new BN('1337'), 6)).toEqual(new BN('1337000000'));
+    expect(toTokenMinimalUnit(new BN4('1337'), 0)).toEqual(new BN4('1337'));
+    expect(toTokenMinimalUnit(new BN4('1337'), 6)).toEqual(new BN4('1337000000'));
   });
 
   it('toTokenMinimalUnit using invalid inputs', () => {
@@ -389,10 +390,10 @@ describe('Number utils :: renderFromTokenMinimalUnit', () => {
   });
 
   it('renderFromTokenMinimalUnit using BN number', () => {
-    expect(renderFromTokenMinimalUnit(new BN('1337'), 0)).toEqual('1337');
-    expect(renderFromTokenMinimalUnit(new BN('1337'), 6)).toEqual('0.00134');
-    expect(renderFromTokenMinimalUnit(new BN('1337'), 10)).toEqual('< 0.00001');
-    expect(renderFromTokenMinimalUnit(new BN('0'), 10)).toEqual('0');
+    expect(renderFromTokenMinimalUnit(new BN4('1337'), 0)).toEqual('1337');
+    expect(renderFromTokenMinimalUnit(new BN4('1337'), 6)).toEqual('0.00134');
+    expect(renderFromTokenMinimalUnit(new BN4('1337'), 10)).toEqual('< 0.00001');
+    expect(renderFromTokenMinimalUnit(new BN4('0'), 10)).toEqual('0');
   });
 });
 
@@ -410,9 +411,9 @@ describe('Number utils :: renderFromWei', () => {
   });
 
   it('renderFromWei using BN number', () => {
-    expect(renderFromWei(new BN('133700000000000000'))).toEqual('0.1337');
-    expect(renderFromWei(new BN('1337'))).toEqual('< 0.00001');
-    expect(renderFromWei(new BN('0'))).toEqual('0');
+    expect(renderFromWei(new BN4('133700000000000000'))).toEqual('0.1337');
+    expect(renderFromWei(new BN4('1337'))).toEqual('< 0.00001');
+    expect(renderFromWei(new BN4('0'))).toEqual('0');
   });
 });
 
@@ -478,9 +479,9 @@ describe('Number utils :: localizeLargeNumber', () => {
 
 describe('Number utils :: calcTokenValueToSend', () => {
   it('calcTokenValueToSend', () => {
-    expect(calcTokenValueToSend(new BN(1337), 0)).toEqual('539');
-    expect(calcTokenValueToSend(new BN(1337), 9)).toEqual('1374b68fa00');
-    expect(calcTokenValueToSend(new BN(1337), 18)).toEqual(
+    expect(calcTokenValueToSend(new BN4(1337), 0)).toEqual('539');
+    expect(calcTokenValueToSend(new BN4(1337), 9)).toEqual('1374b68fa00');
+    expect(calcTokenValueToSend(new BN4(1337), 18)).toEqual(
       '487a9a304539440000',
     );
   });
@@ -491,7 +492,7 @@ describe('Number utils :: hexToBN', () => {
     expect(hexToBN('0x539').toNumber()).toBe(1337);
   });
   it('should handle non string values', () => {
-    const newBN = new BN(1);
+    const newBN = new BN4(1);
     expect(hexToBN(newBN)).toBe(newBN);
   });
 });
@@ -500,7 +501,7 @@ describe('Number utils :: isBN', () => {
   it('isBN', () => {
     const notABN = '0x539';
     expect(isBN(notABN)).toEqual(false);
-    expect(isBN(new BN(1337))).toEqual(true);
+    expect(isBN(new BN4(1337))).toEqual(true);
   });
 });
 
@@ -697,7 +698,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('1650000007.7');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('1650000007');
+    const expected: any = new BN4('1650000007');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -710,7 +711,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN(1650000007.7);
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('1650000007');
+    const expected: any = new BN4('1650000007');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -723,7 +724,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('16500');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('16500');
+    const expected: any = new BN4('16500');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -736,7 +737,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN(16500);
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('16500');
+    const expected: any = new BN4('16500');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -749,7 +750,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('-1650000007.7');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('-1650000007');
+    const expected: any = new BN4('-1650000007');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -762,7 +763,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN(-1650000007.7);
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('-1650000007');
+    const expected: any = new BN4('-1650000007');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -775,7 +776,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('-16500');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('-16500');
+    const expected: any = new BN4('-16500');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -788,7 +789,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN(-16500);
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('-16500');
+    const expected: any = new BN4('-16500');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -801,7 +802,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('75BCD15');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('123456789');
+    const expected: any = new BN4('123456789');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -814,7 +815,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('0x75BCD15');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('123456789');
+    const expected: any = new BN4('123456789');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -827,7 +828,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('-75BCD15');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('-123456789');
+    const expected: any = new BN4('-123456789');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -840,7 +841,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('-0x75BCD15');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('-123456789');
+    const expected: any = new BN4('-123456789');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -853,7 +854,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('0');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('0');
+    const expected: any = new BN4('0');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -866,7 +867,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('0x0');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('0');
+    const expected: any = new BN4('0');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -879,7 +880,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN('0xNaN');
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('0');
+    const expected: any = new BN4('0');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -892,7 +893,7 @@ describe('Number utils :: safeNumberToBN', () => {
     const result: any = safeNumberToBN(NaN);
     // TODO: Replace "any" with type
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    const expected: any = new BN('0');
+    const expected: any = new BN4('0');
     expect(result.words[0]).toEqual(expected.words[0]);
     expect(result.words[1]).toEqual(expected.words[1]);
     expect(result.negative).toEqual(expected.negative);
@@ -1053,7 +1054,7 @@ describe('Number utils :: formatValueToMatchTokenDecimals', () => {
 
 describe('Number utils :: safeBNToHex', () => {
   it('returns hex string', () => {
-    expect(safeBNToHex(new BN('255'))).toBe('0xff');
+    expect(safeBNToHex(new BN4('255'))).toBe('0xff');
   });
 
   it.each([undefined, null])(
diff --git a/app/util/transaction-reducer-helpers.ts b/app/util/transaction-reducer-helpers.ts
index 562fa6db9a7..769b4ae05e0 100644
--- a/app/util/transaction-reducer-helpers.ts
+++ b/app/util/transaction-reducer-helpers.ts
@@ -1,5 +1,5 @@
 import { SecurityAlertResponse } from '@metamask/transaction-controller';
-import { BN } from 'ethereumjs-util';
+import type BN from 'bnjs4';
 
 interface TxMeta {
   data?: string;
diff --git a/app/util/transactions/index.js b/app/util/transactions/index.js
index 71614e75e97..c78a43790c3 100644
--- a/app/util/transactions/index.js
+++ b/app/util/transactions/index.js
@@ -1,4 +1,5 @@
-import { addHexPrefix, toChecksumAddress, BN } from 'ethereumjs-util';
+import { addHexPrefix, toChecksumAddress } from 'ethereumjs-util';
+import BN from 'bnjs4';
 import { rawEncode, rawDecode } from 'ethereumjs-abi';
 import BigNumber from 'bignumber.js';
 import humanizeDuration from 'humanize-duration';
diff --git a/app/util/transactions/index.test.ts b/app/util/transactions/index.test.ts
index 2f8415f8871..d6040f10f35 100644
--- a/app/util/transactions/index.test.ts
+++ b/app/util/transactions/index.test.ts
@@ -1,5 +1,5 @@
 import { swapsUtils } from '@metamask/swaps-controller';
-import { BN } from 'ethereumjs-util';
+import BN from 'bnjs4';
 
 /* eslint-disable-next-line import/no-namespace */
 import * as controllerUtilsModule from '@metamask/controller-utils';
@@ -1082,7 +1082,7 @@ describe('Transactions utils :: isApprovalTransaction', () => {
 });
 
 describe('Transactions utils :: getTransactionReviewActionKey', () => {
-  const transaction = { to: '0xContractAddress' };
+  const transaction = { to: '0xdeadbeef' };
   const chainId = '1';
   it('returns `Unknown Method` review action key when transaction action key exists', async () => {
     const expectedReviewActionKey = 'Unknown Method';
diff --git a/package.json b/package.json
index f35e69939e9..aab4f5b2621 100644
--- a/package.json
+++ b/package.json
@@ -230,6 +230,8 @@
     "axios": "^1.6.8",
     "base-64": "1.0.0",
     "bignumber.js": "^9.0.1",
+    "bnjs4": "npm:bn.js@^4.12.0",
+    "bnjs5": "npm:bn.js@^5.2.1",
     "buffer": "6.0.3",
     "cockatiel": "^3.1.2",
     "compare-versions": "^3.6.0",
@@ -242,8 +244,8 @@
     "eth-block-tracker": "^7.0.1",
     "eth-ens-namehash": "2.0.8",
     "eth-url-parser": "1.0.4",
-    "ethereumjs-abi": "0.6.6",
-    "ethereumjs-util": "6.1.0",
+    "ethereumjs-abi": "^0.6.8",
+    "ethereumjs-util": "^7.1.5",
     "ethers": "^5.0.14",
     "ethjs-ens": "2.0.1",
     "eventemitter2": "^6.4.9",
@@ -392,6 +394,8 @@
     "@testing-library/react": "14.0.0",
     "@testing-library/react-hooks": "^8.0.1",
     "@testing-library/react-native": "12.1.2",
+    "@types/bnjs4": "npm:@types/bn.js@^4.11.6",
+    "@types/bnjs5": "npm:@types/bn.js@^5.1.6",
     "@types/crypto-js": "^4.1.1",
     "@types/enzyme": "^3.10.12",
     "@types/eth-url-parser": "^1.0.0",
@@ -575,7 +579,8 @@
       "@metamask/sdk-communication-layer>eciesjs>secp256k1": false,
       "detox>ws>utf-8-validate": false,
       "ganache>@trufflesuite/uws-js-unofficial>utf-8-validate": false,
-      "@react-native-firebase/app>firebase>@firebase/firestore>@grpc/proto-loader>protobufjs": false
+      "@react-native-firebase/app>firebase>@firebase/firestore>@grpc/proto-loader>protobufjs": false,
+      "ethereumjs-util>ethereum-cryptography>keccak": true
     }
   },
   "packageManager": "yarn@1.22.22"
diff --git a/yarn.lock b/yarn.lock
index a7730cef374..51ac2260bf7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9506,6 +9506,13 @@
   dependencies:
     "@types/node" "*"
 
+"@types/bn.js@^4.11.3":
+  version "4.11.6"
+  resolved "https://registry.yarnpkg.com/@types/bn.js/-/bn.js-4.11.6.tgz#c306c70d9358aaea33cd4eda092a742b9505967c"
+  integrity sha512-pqr857jrp2kPuO9uRjZ3PwnJTjoQy+fcdxvBTvHm6dkmEL9q+hDD/2j/0ELOBPtPnS8LjCX0gI9nbl8lVkadpg==
+  dependencies:
+    "@types/node" "*"
+
 "@types/bn.js@^5.1.0", "@types/bn.js@^5.1.5":
   version "5.1.5"
   resolved "https://registry.yarnpkg.com/@types/bn.js/-/bn.js-5.1.5.tgz#2e0dacdcce2c0f16b905d20ff87aedbc6f7b4bf0"
@@ -9513,6 +9520,20 @@
   dependencies:
     "@types/node" "*"
 
+"@types/bnjs4@npm:@types/bn.js@^4.11.6":
+  version "4.11.6"
+  resolved "https://registry.yarnpkg.com/@types/bn.js/-/bn.js-4.11.6.tgz#c306c70d9358aaea33cd4eda092a742b9505967c"
+  integrity sha512-pqr857jrp2kPuO9uRjZ3PwnJTjoQy+fcdxvBTvHm6dkmEL9q+hDD/2j/0ELOBPtPnS8LjCX0gI9nbl8lVkadpg==
+  dependencies:
+    "@types/node" "*"
+
+"@types/bnjs5@npm:@types/bn.js@^5.1.6":
+  version "5.1.6"
+  resolved "https://registry.yarnpkg.com/@types/bn.js/-/bn.js-5.1.6.tgz#9ba818eec0c85e4d3c679518428afdf611d03203"
+  integrity sha512-Xh8vSwUeMKeYYrj3cX4lGQgFSF/N03r+tv4AiLl1SucqV+uTQpxRcnM8AkXKHwYP9ZPXOYXRr2KPXpVlIvqh9w==
+  dependencies:
+    "@types/node" "*"
+
 "@types/body-parser@*":
   version "1.19.2"
   resolved "https://registry.yarnpkg.com/@types/body-parser/-/body-parser-1.19.2.tgz#aea2059e28b7658639081347ac4fab3de166e6f0"
@@ -13352,7 +13373,7 @@ binary-extensions@^2.0.0:
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-2.2.0.tgz#75f502eeaf9ffde42fc98829645be4ea76bd9e2d"
   integrity sha512-jDctJ/IVQbZoJykoeHbhXpOlNBqGNcwXJKJog42E5HDPUwQTSdjCHdihjj0DlnheQ7blbT6dHOafNAiS8ooQKA==
 
-bindings@^1.2.1, bindings@^1.5.0:
+bindings@^1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/bindings/-/bindings-1.5.0.tgz#10353c9e945334bc0511a6d90b38fbc7c9c504df"
   integrity sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==
@@ -13413,11 +13434,21 @@ bn.js@5.2.1, bn.js@^5.0.0, bn.js@^5.1.2, bn.js@^5.2.0, bn.js@^5.2.1:
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-5.2.1.tgz#0bc527a6a0d18d0aa8d5b0538ce4a77dccfa7b70"
   integrity sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ==
 
-bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.10.0, bn.js@^4.11.0, bn.js@^4.11.8, bn.js@^4.11.9:
+bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.11.0, bn.js@^4.11.8, bn.js@^4.11.9:
   version "4.12.0"
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
   integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
 
+"bnjs4@npm:bn.js@^4.12.0":
+  version "4.12.0"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
+  integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
+
+"bnjs5@npm:bn.js@^5.2.1":
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-5.2.1.tgz#0bc527a6a0d18d0aa8d5b0538ce4a77dccfa7b70"
+  integrity sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ==
+
 body-parser@1.20.3, body-parser@^1.15.2, body-parser@^1.18.2, body-parser@^1.19.0:
   version "1.20.3"
   resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.20.3.tgz#1953431221c6fb5cd63c4b36d53fab0928e548c6"
@@ -17085,41 +17116,28 @@ ethereum-ens-network-map@^1.0.0:
   resolved "https://registry.yarnpkg.com/ethereum-ens-network-map/-/ethereum-ens-network-map-1.0.2.tgz#4e27bad18dae7bd95d84edbcac2c9e739fc959b9"
   integrity sha512-5qwJ5n3YhjSpE6O/WEBXCAb2nagUgyagJ6C0lGUBWC4LjKp/rRzD+pwtDJ6KCiITFEAoX4eIrWOjRy0Sylq5Hg==
 
-ethereumjs-abi@0.6.6:
-  version "0.6.6"
-  resolved "https://registry.yarnpkg.com/ethereumjs-abi/-/ethereumjs-abi-0.6.6.tgz#f8ba3413a98478173f5a00f7f1316819db1d09ec"
-  integrity sha512-w8KubDsA/+OAuqtIR9RGsMcoZ5nhM8vxwjJAJvEIY+clhxA3BHoLG3+ClYQaQhD0n3mlDt3U5rBrmSVJvI3c8A==
-  dependencies:
-    bn.js "^4.10.0"
-    ethereumjs-util "^5.0.0"
-
-ethereumjs-util@6.1.0:
-  version "6.1.0"
-  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-6.1.0.tgz#e9c51e5549e8ebd757a339cc00f5380507e799c8"
-  integrity sha512-URESKMFbDeJxnAxPppnk2fN6Y3BIatn9fwn76Lm8bQlt+s52TpG8dN9M66MLPuRAiAOIqL3dfwqWJf0sd0fL0Q==
+ethereumjs-abi@^0.6.8:
+  version "0.6.8"
+  resolved "https://registry.yarnpkg.com/ethereumjs-abi/-/ethereumjs-abi-0.6.8.tgz#71bc152db099f70e62f108b7cdfca1b362c6fcae"
+  integrity sha512-Tx0r/iXI6r+lRsdvkFDlut0N08jWMnKRZ6Gkq+Nmw75lZe4e6o3EkSnkaBP5NF6+m5PTGAr9JP43N3LyeoglsA==
   dependencies:
-    bn.js "^4.11.0"
-    create-hash "^1.1.2"
-    ethjs-util "0.1.6"
-    keccak "^1.0.2"
-    rlp "^2.0.0"
-    safe-buffer "^5.1.1"
-    secp256k1 "^3.0.1"
+    bn.js "^4.11.8"
+    ethereumjs-util "^6.0.0"
 
-ethereumjs-util@^5.0.0:
-  version "5.2.1"
-  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-5.2.1.tgz#a833f0e5fca7e5b361384dc76301a721f537bf65"
-  integrity sha512-v3kT+7zdyCm1HIqWlLNrHGqHGLpGYIhjeHxQjnDXjLT2FyGJDsd3LWMYUo7pAFRrk86CR3nUJfhC81CCoJNNGQ==
+ethereumjs-util@^6.0.0:
+  version "6.2.1"
+  resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-6.2.1.tgz#fcb4e4dd5ceacb9d2305426ab1a5cd93e3163b69"
+  integrity sha512-W2Ktez4L01Vexijrm5EB6w7dg4n/TgpoYU4avuT5T3Vmnw/eCRtiBrJfQYS/DCSvDIOLn2k57GcHdeBcgVxAqw==
   dependencies:
+    "@types/bn.js" "^4.11.3"
     bn.js "^4.11.0"
     create-hash "^1.1.2"
     elliptic "^6.5.2"
     ethereum-cryptography "^0.1.3"
-    ethjs-util "^0.1.3"
-    rlp "^2.0.0"
-    safe-buffer "^5.1.1"
+    ethjs-util "0.1.6"
+    rlp "^2.2.3"
 
-ethereumjs-util@^7.0.10, ethereumjs-util@^7.0.8, ethereumjs-util@^7.1.2:
+ethereumjs-util@^7.0.10, ethereumjs-util@^7.0.8, ethereumjs-util@^7.1.2, ethereumjs-util@^7.1.5:
   version "7.1.5"
   resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-7.1.5.tgz#9ecf04861e4fbbeed7465ece5f23317ad1129181"
   integrity sha512-SDl5kKrQAudFBUe5OJM9Ac6WmMyYmXX/6sTmLZ3ffG2eY6ZIGBes3pEDxNN6V72WyOw4CPD5RomKdsa8DAAwLg==
@@ -17266,7 +17284,7 @@ ethjs-util@0.1.3:
     is-hex-prefixed "1.0.0"
     strip-hex-prefix "1.0.0"
 
-ethjs-util@0.1.6, ethjs-util@^0.1.3, ethjs-util@^0.1.6:
+ethjs-util@0.1.6, ethjs-util@^0.1.6:
   version "0.1.6"
   resolved "https://registry.yarnpkg.com/ethjs-util/-/ethjs-util-0.1.6.tgz#f308b62f185f9fe6237132fb2a9818866a5cd536"
   integrity sha512-CUnVOQq7gSpDHZVVrQW8ExxUETWrnrvXYvYz55wOU8Uj4VCgw56XC2B/fVqQN+f7gmrnRHSLVnFAwsCuNwji8w==
@@ -21068,16 +21086,6 @@ keccak@3.0.2, keccak@^3.0.0:
     node-gyp-build "^4.2.0"
     readable-stream "^3.6.0"
 
-keccak@^1.0.2:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/keccak/-/keccak-1.4.0.tgz#572f8a6dbee8e7b3aa421550f9e6408ca2186f80"
-  integrity sha512-eZVaCpblK5formjPjeTBik7TAg+pqnDrMHIffSvi9Lh7PQgM1+hSzakUeZFCk9DVVG0dacZJuaz2ntwlzZUIBw==
-  dependencies:
-    bindings "^1.2.1"
-    inherits "^2.0.3"
-    nan "^2.2.1"
-    safe-buffer "^5.1.0"
-
 keygrip@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/keygrip/-/keygrip-1.1.0.tgz#871b1681d5e159c62a445b0c74b615e0917e7226"
@@ -22757,7 +22765,7 @@ mz@^2.7.0:
     object-assign "^4.0.1"
     thenify-all "^1.0.0"
 
-nan@^2.14.0, nan@^2.2.1:
+nan@^2.14.0:
   version "2.20.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.20.0.tgz#08c5ea813dd54ed16e5bd6505bf42af4f7838ca3"
   integrity sha512-bk3gXBZDGILuuo/6sKtr0DQmSThYHLtNCdSdXk9YkxD/jK6X2vmCyyXBBxyqZ4XcnzTyYEAThfX3DCEnLf6igw==
@@ -26465,7 +26473,7 @@ ripemd160@^2.0.0, ripemd160@^2.0.1, ripemd160@^2.0.2:
     hash-base "^3.0.0"
     inherits "^2.0.1"
 
-rlp@^2.0.0, rlp@^2.2.4, rlp@^2.2.6:
+rlp@^2.2.3, rlp@^2.2.4, rlp@^2.2.6:
   version "2.2.7"
   resolved "https://registry.yarnpkg.com/rlp/-/rlp-2.2.7.tgz#33f31c4afac81124ac4b283e2bd4d9720b30beaf"
   integrity sha512-d5gdPmgQ0Z+AklL2NVXr/IoSjNZFfTVvQWzL/AM2AOcSzYP2xjlb0AC8YyCLc41MSNf6P6QVtjgPdmVtzb+4lQ==
@@ -26656,7 +26664,7 @@ scrypt-js@3.0.1, scrypt-js@^3.0.0, scrypt-js@^3.0.1:
   resolved "https://registry.yarnpkg.com/scrypt-js/-/scrypt-js-3.0.1.tgz#d314a57c2aef69d1ad98a138a21fe9eafa9ee312"
   integrity sha512-cdwTTnqPu0Hyvf5in5asVdZocVDTNRmR7XEcJuIzMjJeSHybHl7vpB66AzwTaIg6CLSbtjcxc8fqcySfnTkccA==
 
-secp256k1@3.8.1, secp256k1@^3.0.1:
+secp256k1@3.8.1:
   version "3.8.1"
   resolved "https://registry.yarnpkg.com/secp256k1/-/secp256k1-3.8.1.tgz#b62a62a882d6b16f9b51fe599c6b3a861e36c59f"
   integrity sha512-tArjQw2P0RTdY7QmkNehgp6TVvQXq6ulIhxv8gaH6YubKG/wxxAoNKcbuXjDhybbc+b2Ihc7e0xxiGN744UIiQ==