diff --git a/woa/init.py b/woa/init.py
index 5a8cebf..1775c77 100644
--- a/woa/init.py
+++ b/woa/init.py
@@ -1,6 +1,7 @@
 import asyncio
 import os
 import time
+from functools import partial
 from aiohttp import web, ClientSession, FormData, ClientTimeout
 from wechatpy.client import WeChatClient
 from wechatpy.crypto import WeChatCrypto