diff --git a/.env.example b/.env.example
index 16a0da8..55e2c41 100644
--- a/.env.example
+++ b/.env.example
@@ -6,3 +6,4 @@ MINIMUM_WITHDRAWAL_AMOUNT=0.05
 MAXIMUM_DEPOSIT_AMOUNT=1
 ALCHEMY_KEY=
 INFURA_API_KEY=
+ETHERSCAN_KEY=
diff --git a/hardhat.config.js b/hardhat.config.js
index c7c6f68..304daed 100644
--- a/hardhat.config.js
+++ b/hardhat.config.js
@@ -88,7 +88,7 @@ const config = {
           },
     },
     mainnet: {
-      url: process.env.ETH_RPC || '',
+      url: `https://eth-mainnet.alchemyapi.io/v2/${process.env.ALCHEMY_KEY}`,
       accounts: process.env.PRIVATE_KEY
         ? [process.env.PRIVATE_KEY]
         : {