diff --git a/cron.py b/cron.py
index 0f8d6b6..d932005 100755
--- a/cron.py
+++ b/cron.py
@@ -4,25 +4,20 @@ import os
 import django
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "djing.settings")
 django.setup()
-from abonapp.models import Abon
+from django.utils import timezone
+from django.db.models import signals
+from abonapp.models import Abon, AbonTariff, abontariff_pre_delete
 from agent import Transmitter, NasNetworkError, NasFailedResult
 from mydefs import LogicError
 
 
 def main():
-    users = Abon.objects.all()
-    for user in users:
-        try:
-            # бдим за услугами абонента
-            user.bill_service(user)
-
-        except (NasNetworkError, NasFailedResult) as er:
-            print("Error:", er)
-        except LogicError as er:
-            print("Notice:", er)
+    signals.pre_delete.disconnect(abontariff_pre_delete, sender=AbonTariff)
+    AbonTariff.objects.filter(deadline__lt=timezone.now()).delete()
     tm = Transmitter()
     users = Abon.objects.filter(is_dynamic_ip=False, is_active=True).exclude(current_tariff=None)
     tm.sync_nas(users)
+    signals.pre_delete.connect(abontariff_pre_delete, sender=AbonTariff)
 
 
 if __name__ == "__main__":