diff --git a/src/HttpClient.php b/src/HttpClient.php
index d006d2d..3247461 100644
--- a/src/HttpClient.php
+++ b/src/HttpClient.php
@@ -182,8 +182,9 @@ public function exec(?float $timeout = null):Response
         return $response;
     }
 
-    public function upgrade():bool
+    public function upgrade(bool $mask = true):bool
     {
+        $this->clientSetting['websocket_mask'] = $mask;
         $client = $this->createClient();
         return $client->upgrade($this->getUri($this->url->getPath(),$this->url->getQuery()));
     }