diff --git a/contracts/hardhat.config.ts b/contracts/hardhat.config.ts
index f76961e96..e9fcb6931 100644
--- a/contracts/hardhat.config.ts
+++ b/contracts/hardhat.config.ts
@@ -82,11 +82,13 @@ export default {
   },
   etherscan: {
     apiKey: {
-      arbitrum: process.env.ARBISCAN_API_KEY || 'YOUR_ARBISCAN_API_KEY',
+      arbitrumOne: process.env.ARBISCAN_API_KEY || 'YOUR_ARBISCAN_API_KEY',
       'arbitrum-sepolia':
         process.env.ARBISCAN_API_KEY || 'YOUR_ARBISCAN_API_KEY',
+      optimisticEthereum:
+        process.env.OPTIMISMSCAN_API_KEY || 'YOUR_OPTIMISMSCAN_API_KEY',
       'optimism-sepolia':
-        process.env.OPTIMISMSCAN_API_KEY || 'YOUR_ARBISCAN_API_KEY',
+        process.env.OPTIMISMSCAN_API_KEY || 'YOUR_OPTIMISMSCAN_API_KEY',
     },
     customChains: [
       {