diff --git a/src/pretix/control/views/subevents.py b/src/pretix/control/views/subevents.py
index 929124405..9a92626af 100644
--- a/src/pretix/control/views/subevents.py
+++ b/src/pretix/control/views/subevents.py
@@ -1,5 +1,5 @@
 import copy
-from datetime import datetime, timedelta, time
+from datetime import datetime, time, timedelta
 
 from dateutil.rrule import DAILY, MONTHLY, WEEKLY, YEARLY, rrule, rruleset
 from django.contrib import messages