diff --git a/controllers/im.go b/controllers/im.go
index accbea480..52e871b45 100644
--- a/controllers/im.go
+++ b/controllers/im.go
@@ -28,6 +28,7 @@ func (c *IMController) StartWebSocket() {
 		globals.SugarLogger.Errorf("upgrade error: %v", err)
 		return
 	}
+	defer ws.Close()
 	clientID := c.GetString("clientID")
 	globals.SugarLogger.Debugf("clientID=%s", clientID)
 	im.StartWebSocket(ws, clientID, err)