diff --git a/graphene_django/rest_framework/mutation.py b/graphene_django/rest_framework/mutation.py
index 94d1e4b..58c6b9c 100644
--- a/graphene_django/rest_framework/mutation.py
+++ b/graphene_django/rest_framework/mutation.py
@@ -84,4 +84,9 @@ class SerializerMutation(ClientIDMutation):
     @classmethod
     def perform_mutate(cls, serializer, info):
         obj = serializer.save()
-        return cls(errors=None, **obj)
+
+        kwargs = {}
+        for f, field in serializer.fields.items():
+          kwargs[f] = field.get_attribute(obj)
+
+        return cls(errors=None, **kwargs)