diff --git a/pkg/rpc/methods.go b/pkg/rpc/methods.go
index 3de804a60..af6a42a5c 100644
--- a/pkg/rpc/methods.go
+++ b/pkg/rpc/methods.go
@@ -29,7 +29,7 @@ var (
 	syncProgressRecheckDelay       = 12 * time.Second
 	waitL1OriginPollingInterval    = 3 * time.Second
 	defaultWaitL1OriginTimeout     = 3 * time.Minute
-	defaultMaxTransactionsPerBlock = uint64(150)
+	defaultMaxTransactionsPerBlock = uint64(79)
 )
 
 // ensureGenesisMatched fetches the L2 genesis block from TaikoL1 contract,
@@ -72,6 +72,8 @@ func (c *Client) ensureGenesisMatched(ctx context.Context) error {
 				nodeGenesis.Hash(),
 				common.BytesToHash(l2GenesisHash[:]),
 			)
+		} else {
+			return nil
 		}
 	}
 	log.Warn("Genesis block not found in TaikoL1")