diff --git a/node/src/chain_spec/localnet.rs b/node/src/chain_spec/localnet.rs
index 06ff5b755..7f5b3611c 100644
--- a/node/src/chain_spec/localnet.rs
+++ b/node/src/chain_spec/localnet.rs
@@ -120,5 +120,8 @@ fn localnet_genesis(
         "senateMembers": {
             "members": senate_members,
         },
+        "evmChainId": {
+            "chainId": 42,
+        },
     })
 }