From c6cb5a0277fce1b87a4b417002289c31f0ee44bc Mon Sep 17 00:00:00 2001
From: Adam Johnson <me@adamj.eu>
Date: Wed, 29 Dec 2021 00:02:50 +0000
Subject: [PATCH] Refs #29708 -- Stopped inheriting from PickleSerializer by
 RedisSerializer.

---
 django/core/cache/backends/redis.py | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/django/core/cache/backends/redis.py b/django/core/cache/backends/redis.py
index ec2fb06102c..f168e937379 100644
--- a/django/core/cache/backends/redis.py
+++ b/django/core/cache/backends/redis.py
@@ -1,31 +1,30 @@
 """Redis cache backend."""
 
+import pickle
 import random
 import re
 
 from django.core.cache.backends.base import DEFAULT_TIMEOUT, BaseCache
-from django.core.serializers.base import PickleSerializer
 from django.utils.functional import cached_property
 from django.utils.module_loading import import_string
 
 
-class RedisSerializer(PickleSerializer):
-    """
-    Similar to PickSerializer, except integers are serialized as native Redis
-    integers for better incr() and decr() atomicity.
-    """
+class RedisSerializer:
+    def __init__(self, protocol=None):
+        self.protocol = pickle.HIGHEST_PROTOCOL if protocol is None else protocol
+
     def dumps(self, obj):
         # Only skip pickling for integers, a int subclasses as bool should be
         # pickled.
         if type(obj) is int:
             return obj
-        return super().dumps(obj)
+        return pickle.dumps(obj, self.protocol)
 
     def loads(self, data):
         try:
             return int(data)
         except ValueError:
-            return super().loads(data)
+            return pickle.loads(data)
 
 
 class RedisCacheClient: