diff --git a/server/websocket.go b/server/websocket.go
index 42fdf30..ea7e6a4 100644
--- a/server/websocket.go
+++ b/server/websocket.go
@@ -315,7 +315,7 @@ func (c *websocketConn) handleRequest(bot *coolq.CQBot, payload []byte) {
 
 func (s *websocketServer) onBotPushEvent(m coolq.MSG) {
 	s.eventConnMutex.Lock()
-	s.eventConnMutex.Unlock()
+	defer s.eventConnMutex.Unlock()
 	pos := 0
 	for _, conn := range s.eventConn {
 		log.Debugf("向WS客户端 %v 推送Event: %v", conn.RemoteAddr().String(), m.ToJson())