Update pyyaml version.

redis_cache/serializers.py

@@ -66,10 +66,11 @@ class MSGPackSerializer(BaseSerializer):
 class YAMLSerializer(BaseSerializer):
 
     def serialize(self, value):
-        return yaml.dump(value, encoding='utf-8')
+        return yaml.dump(value, encoding='utf-8', Dumper=yaml.Dumper)
 
     def deserialize(self, value):
-        return yaml.load(value)
+        return yaml.load(value, Loader=yaml.FullLoader)
+
 
 class DummySerializer(BaseSerializer):
 

requirements-dev.txt

@@ -2,4 +2,4 @@ hiredis==0.2.0
 django-nose==1.4.4
 nose==1.3.6
 msgpack-python==0.4.6
-pyyaml==3.13
+pyyaml==5.3.1