update
diff --git a/clientconn.go b/clientconn.go
index 029899f..38c1823 100644
--- a/clientconn.go
+++ b/clientconn.go
@@ -104,8 +104,6 @@
 const (
 	defaultClientMaxReceiveMessageSize = 1024 * 1024 * 4
 	defaultClientMaxSendMessageSize    = 1024 * 1024 * 4
-	defaultServerMaxReceiveMessageSize = 1024 * 1024 * 4
-	defaultServerMaxSendMessageSize    = 1024 * 1024 * 4
 )
 
 // DialOption configures how we set up the connection.