diff --git a/unipay/providers/wechat.py b/unipay/providers/wechat.py
index c54ccb5..40911f1 100644
--- a/unipay/providers/wechat.py
+++ b/unipay/providers/wechat.py
@@ -4,6 +4,7 @@ import json
 import time
 import aiohttp
 from appPublic.dictObject import DictObject
+from appPublic.log import debug, exception
 from typing import Dict, Any
 from cryptography.hazmat.primitives import hashes, serialization
 from cryptography.hazmat.primitives.asymmetric import padding