diff --git a/dojo/api_v2/serializers.py b/dojo/api_v2/serializers.py
index 6e100f43b57..00861b1b55f 100644
--- a/dojo/api_v2/serializers.py
+++ b/dojo/api_v2/serializers.py
@@ -1,3 +1,4 @@
+import collections
 import json
 import logging
 import re
@@ -280,10 +281,10 @@ def _pop_tags(self, validated_data):
         return (to_be_tagged, validated_data)
 
 
-class RequestResponseDict(list):
+class RequestResponseDict(collections.UserList):
     def __init__(self, *args, **kwargs):
         pretty_print = kwargs.pop("pretty_print", True)
-        list.__init__(self, *args, **kwargs)
+        collections.UserList.__init__(self, *args, **kwargs)
         self.pretty_print = pretty_print
 
     def __add__(self, rhs):