diff --git a/aleksis/apps/chronos/util/chronos_helpers.py b/aleksis/apps/chronos/util/chronos_helpers.py
index 11b1c5b9c697a5d6fbc787cac70a5ff9c96615c4..64349e54ee52ba36643d82a973e8baac5124bef2 100644
--- a/aleksis/apps/chronos/util/chronos_helpers.py
+++ b/aleksis/apps/chronos/util/chronos_helpers.py
@@ -3,7 +3,8 @@ from typing import Optional
 from django.http import HttpRequest, HttpResponseNotFound
 from django.shortcuts import get_object_or_404
 
-from aleksis.core.models import Person, Group
+from aleksis.core.models import Group, Person
+
 from ..managers import TimetableType
 from ..models import LessonPeriod, LessonSubstitution, Room