diff --git a/src/PushServer.php b/src/PushServer.php
index e66b4d1..28ac700 100644
--- a/src/PushServer.php
+++ b/src/PushServer.php
@@ -70,7 +70,7 @@ class PushServer
     /** @var AbstractEvent|null 最近一个事件 */
     protected ?AbstractEvent $_lastEvent = null;
 
-    protected function __construct()
+    public function __construct()
     {
         $this->_keepaliveTimeout = self::getConfig('heartbeat', 60);
     }