diff --git a/woa/init.py b/woa/init.py
index 7a607ee..e8339c5 100644
--- a/woa/init.py
+++ b/woa/init.py
@@ -2,6 +2,7 @@ import asyncio
 import os
 import time
 from aiohttp import web, ClientSession, FormData, ClientTimeout
+from wechatpy.client import WeChatClient
 from wechatpy.crypto import WeChatCrypto
 from wechatpy.exceptions import InvalidSignatureException, WeChatClientException
 from wechatpy.messages import (