diff --git a/wshandler/wshandler_peer.go b/wshandler/wshandler_peer.go
index 276f886..94b66b9 100644
--- a/wshandler/wshandler_peer.go
+++ b/wshandler/wshandler_peer.go
@@ -272,7 +272,12 @@ func (ws *websocketPeerHandler[T]) upgrade_core(conn *websocket.Conn, accid prim
 							response = append(response, j...)
 						}
 					}
-					c.WriteMessage(websocket.BinaryMessage, response)
+					pmsg, err := websocket.NewPreparedMessage(websocket.BinaryMessage, response)
+					if err != nil {
+						logger.Println("websocket.NewPreparedMessage failed :", err)
+					} else {
+						c.WritePreparedMessage(pmsg)
+					}
 				} else {
 					cmd := make([]byte, flag[0])
 					r.Read(cmd)