Small fix

aiogram/bot/api.py

@@ -4,6 +4,7 @@ import os
 import aiohttp
 
 from ..exceptions import ValidationError, TelegramAPIError
+from ..utils import json
 
 log = logging.getLogger('aiogram')
 
@@ -40,7 +41,7 @@ async def _check_result(method_name, response):
         raise TelegramAPIError(f"The server returned HTTP {response.status}. Response body:\n[{body}]",
                                method_name, response.status, body)
 
-    result_json = await response.json()
+    result_json = await response.json(loads=json.loads)
 
     if not result_json.get('ok'):
         body = await response.text()

aiogram/bot/base.py

@@ -1,10 +1,10 @@
 import asyncio
 import io
-import json
 
 import aiohttp
 
 from . import api
+from ..utils import json
 from ..utils.payload import generate_payload
 
 

aiogram/bot/bot.py

@@ -1,5 +1,5 @@
 import datetime
-import json
+from ..utils import json
 import time
 
 from .base import BaseBot