diff --git a/src/pretix/api/serializers/__init__.py b/src/pretix/api/serializers/__init__.py
index b35fb1eb2..3e82178b5 100644
--- a/src/pretix/api/serializers/__init__.py
+++ b/src/pretix/api/serializers/__init__.py
@@ -21,8 +21,8 @@
 #
 import json
 
-from django.core.exceptions import ValidationError
 from rest_framework import serializers
+from rest_framework.exceptions import ValidationError
 
 
 class AsymmetricField(serializers.Field):