diff --git a/aiogram/dispatcher/webhook.py b/aiogram/dispatcher/webhook.py
index 89636aa8..6184de10 100644
--- a/aiogram/dispatcher/webhook.py
+++ b/aiogram/dispatcher/webhook.py
@@ -67,7 +67,6 @@ class WebhookRequestHandler(web.View):
         """
         data = await self.request.json()
         update = types.Update(**data)
-        bot.prepare_object(update, parent=bot)
         return update
 
     async def post(self):