diff --git a/backend/core/celery.py b/backend/core/celery.py
index 301bfe3..6fcbc17 100644
--- a/backend/core/celery.py
+++ b/backend/core/celery.py
@@ -12,7 +12,7 @@ app.config_from_object("django.conf:settings", namespace="CELERY")
 app.conf.beat_schedule = {
     "auth.flush_expired_tokens": {
         "task": "api.authentication.tasks.flush_expired_tokens",
-        "schedule": crontab(hour=2, minute=0),  # Daily at 2:00 AM
+        "schedule": crontab(hour="2", minute="0"),  # Daily at 2:00 AM
     },
 }