diff --git a/competition/models.py b/competition/models.py
index 1b68adc..07322ad 100644
--- a/competition/models.py
+++ b/competition/models.py
@@ -1,6 +1,6 @@
 import datetime
 import json
-from typing import Iterable, Optional
+from typing import Optional
 
 from django.conf import settings
 from django.contrib.sites.models import Site