diff --git a/session/sess_file.go b/session/sess_file.go
index 0758d6b4..53e19811 100644
--- a/session/sess_file.go
+++ b/session/sess_file.go
@@ -78,6 +78,8 @@ func (fs *FileSessionStore) SessionID() string {
 
 // SessionRelease Write file session to local file with Gob string
 func (fs *FileSessionStore) SessionRelease(w http.ResponseWriter) {
+	filepder.lock.Lock()
+	defer filepder.lock.Unlock()
 	b, err := EncodeGob(fs.values)
 	if err != nil {
 		SLogger.Println(err)