diff --git a/main.py b/main.py
index 2b6b8cb..4985aa0 100755
--- a/main.py
+++ b/main.py
@@ -168,6 +168,7 @@ def getRequestIdByNominalDestination(nominal, destination):
 def pushTopupStatus(request_id, response_code, _message, dontparsesn = False):
     global BALANCE
     global CHIPINFO
+    global LAST_SN
     
     redis_key = sate24.keyByRequestId(CHIPINFO, request_id) + '.response_code'
     if response_code == '00':