diff --git a/src/opengradient/client/alpha.py b/src/opengradient/client/alpha.py
index d2957c2..80327da 100644
--- a/src/opengradient/client/alpha.py
+++ b/src/opengradient/client/alpha.py
@@ -164,6 +164,7 @@ def _send_tx_with_revert_handling(self, run_function):
                 "nonce": nonce,
                 "gas": gas_limit,
                 "gasPrice": self._blockchain.eth.gas_price,
+                "chainId": self._blockchain.eth.chain_id,
             }
         )