diff --git a/core/lib/eth_signer/src/g_kms_signer.rs b/core/lib/eth_signer/src/g_kms_signer.rs
index 7a9e4e006..d3be89bf2 100644
--- a/core/lib/eth_signer/src/g_kms_signer.rs
+++ b/core/lib/eth_signer/src/g_kms_signer.rs
@@ -119,6 +119,7 @@ impl EthereumSigner for GKMSSigner {
             .await
             .map_err(|e| SignerError::SigningFailed(e.to_string()))?;
 
+        let adjust_v = signature.v + raw_tx.chain_id * 2 + 35;
         let r_h256 = H256::from_slice(signature.r.as_byte_slice());
         let s_h256 = H256::from_slice(signature.s.as_byte_slice());
 
@@ -128,7 +129,7 @@ impl EthereumSigner for GKMSSigner {
         );
 
         let web3_sig = Signature {
-            v: signature.v,
+            v: adjust_v,
             r: r_h256,
             s: s_h256,
         };