diff --git a/javascript/packages/orchestrator/src/chainSpec.ts b/javascript/packages/orchestrator/src/chainSpec.ts
index be989919e..e8699c0e7 100644
--- a/javascript/packages/orchestrator/src/chainSpec.ts
+++ b/javascript/packages/orchestrator/src/chainSpec.ts
@@ -16,7 +16,7 @@ const debug = require("debug")("zombie::chain-spec");
 const JSONStream = require("JSONStream");
 
 // track 1st staking as default;
-let stakingBond: number | undefined;
+let stakingBond: bigint | undefined;
 
 export type KeyType = "session" | "aura" | "grandpa";
 
@@ -73,7 +73,7 @@ export function clearAuthorities(specPath: string) {
 
     // Clear staking
     if (runtimeConfig?.staking) {
-      stakingBond = runtimeConfig.staking.stakers[0][2];
+      stakingBond = BigInt(runtimeConfig.staking.stakers[0][2]);
       runtimeConfig.staking.stakers = [];
       runtimeConfig.staking.invulnerables = [];
       runtimeConfig.staking.validatorCount = 0;
@@ -103,7 +103,7 @@ export async function addBalances(specPath: string, nodes: Node[]) {
         const balanceToAdd = stakingBond
           ? node.validator && node.balance > stakingBond
             ? node.balance
-            : stakingBond! + 1
+            : stakingBond! + BigInt(1)
           : node.balance;
         runtimeConfig.balances.balances.push([stash_key, balanceToAdd]);
 
@@ -206,7 +206,7 @@ export async function addStaking(specPath: string, node: Node) {
     runtimeConfig.staking.stakers.push([
       sr_stash.address,
       sr_stash.address,
-      stakingBond || 1000000000000,
+      stakingBond || BigInt(1000000000000),
       "Validator",
     ]);
 
@@ -354,7 +354,7 @@ export async function generateNominators(
       // create account
       const nom = await generateKeyFromSeed(`nom-${i}`);
       // add to balances
-      const balanceToAdd = stakingBond! + 1;
+      const balanceToAdd = stakingBond! + BigInt(1);
       runtimeConfig.balances.balances.push([nom.address, balanceToAdd]);
       // random nominations
       const count = crypto.randomInt(maxForRandom) % maxNominations;
diff --git a/javascript/packages/orchestrator/src/types.ts b/javascript/packages/orchestrator/src/types.ts
index 06287eebe..e48230a1e 100644
--- a/javascript/packages/orchestrator/src/types.ts
+++ b/javascript/packages/orchestrator/src/types.ts
@@ -156,7 +156,7 @@ export interface Node {
   name: string;
   key?: string;
   accounts?: any;
-  balance?: number;
+  balance?: bigint;
   command?: string;
   commandWithArgs?: string;
   fullCommand?: string;