diff --git a/aleksis/apps/chronos/util/chronos_helpers.py b/aleksis/apps/chronos/util/chronos_helpers.py
index 69d486270615d8bbf18829cd00f643484eb07903..b06edf957711c6e56acf38c1845785c6a4819364 100644
--- a/aleksis/apps/chronos/util/chronos_helpers.py
+++ b/aleksis/apps/chronos/util/chronos_helpers.py
@@ -1,3 +1,4 @@
+from datetime import timedelta
 from typing import TYPE_CHECKING, Optional
 
 from django.db.models import Count, Q