diff --git a/packages/common/src/common.ts b/packages/common/src/common.ts
index a514c1bf03..a951198873 100644
--- a/packages/common/src/common.ts
+++ b/packages/common/src/common.ts
@@ -120,6 +120,16 @@ export class Common extends EventEmitter {
           opts
         )
       }
+      if (chainParamsOrName === CustomChain.ArbitrumOne) {
+        return Common.custom(
+          {
+            name: CustomChain.ArbitrumOne,
+            chainId: 42161,
+            networkId: 42161,
+          },
+          opts
+        )
+      }
       if (chainParamsOrName === CustomChain.xDaiChain) {
         return Common.custom(
           {
diff --git a/packages/common/src/enums.ts b/packages/common/src/enums.ts
index 3c3e647295..c96b781a01 100644
--- a/packages/common/src/enums.ts
+++ b/packages/common/src/enums.ts
@@ -60,6 +60,13 @@ export enum CustomChain {
    */
   ArbitrumRinkebyTestnet = 'arbitrum-rinkeby-testnet',
 
+  /**
+   * Arbitrum One - mainnet for Arbitrum roll-up
+   *
+   * - [Documentation](https://developer.offchainlabs.com/public-chains)
+   */
+  ArbitrumOne = 'arbitrum-one',
+
   /**
    * xDai EVM sidechain with a native stable token
    *