diff --git a/chat.py b/chat.py
index d88e5a0ea664116d3b77383f4f234b49d5564fcc..006a2590da254fba5652abdd1d2913ace0e21b5b 100644
--- a/chat.py
+++ b/chat.py
@@ -51,7 +51,7 @@ async def echo(websocket):
             else :
                 # h = []
                 h = 0;
-            r = {'type':'history_num','content':h}
+            r = {'type':'history_num','content':str(h)}
             message = json.dumps(r,ensure_ascii=False)
             await websocket.send(message)
         #历史记录