diff --git a/channels/binding/websockets.py b/channels/binding/websockets.py
index 6017150..bf57b9f 100644
--- a/channels/binding/websockets.py
+++ b/channels/binding/websockets.py
@@ -112,8 +112,7 @@ class WebsocketBinding(Binding):
                 "fields": data,
             }
         ]
-        # TODO: Avoid the JSON roundtrip by using encoder directly?
-        return list(serializers.deserialize("json", json.dumps(s_data)))[0]
+        return list(serializers.deserialize("python", s_data))[0]
 
     def create(self, data):
         self._hydrate(None, data).save()