diff --git a/handler/handler.py b/handler/handler.py
index c994900..085496f 100644
--- a/handler/handler.py
+++ b/handler/handler.py
@@ -96,5 +96,6 @@ class Handler(metaclass=ABCMeta):
         m.update((str(appid) + project + type_ + event + event_act + str(timestamp) + self.secret_token).encode('utf8'))
         local_sign = m.hexdigest()
         if sign != local_sign:
+            logger.warning(str(appid) + project + type_ + event + event_act + str(timestamp) + self.secret_token)
             return False
         return True