diff --git a/src/pretix/presale/middleware.py b/src/pretix/presale/middleware.py
index 865040015..09ab9bc01 100644
--- a/src/pretix/presale/middleware.py
+++ b/src/pretix/presale/middleware.py
@@ -1,5 +1,4 @@
 from django.urls import resolve
-from django.utils.deprecation import MiddlewareMixin
 from django_scopes import scope
 
 from pretix.presale.signals import process_response