diff --git a/aiogram/api/session/aiohttp.py b/aiogram/api/session/aiohttp.py
index d981caeb..ea814c84 100644
--- a/aiogram/api/session/aiohttp.py
+++ b/aiogram/api/session/aiohttp.py
@@ -1,17 +1,21 @@
-import json
-from typing import Optional, TypeVar
+from typing import Optional, TypeVar, Callable
 
 from aiohttp import ClientSession, FormData
 
-from ..methods import Request, TelegramMethod
 from .base import PRODUCTION, BaseSession, TelegramAPIServer
+from ..methods import Request, TelegramMethod
 
 T = TypeVar("T")
 
 
 class AiohttpSession(BaseSession):
-    def __init__(self, api: TelegramAPIServer = PRODUCTION):
-        super(AiohttpSession, self).__init__(api=api)
+    def __init__(
+        self,
+        api: TelegramAPIServer = PRODUCTION,
+        json_loads: Optional[Callable] = None,
+        json_dumps: Optional[Callable] = None,
+    ):
+        super(AiohttpSession, self).__init__(api=api, json_loads=json_loads, json_dumps=json_dumps)
         self._session: Optional[ClientSession] = None
 
     async def create_session(self):
@@ -23,7 +27,7 @@ class AiohttpSession(BaseSession):
             await self._session.close()
 
     def build_form_data(self, request: Request):
-        form = FormData()
+        form = FormData(quote_fields=False)
         for key, value in request.data.items():
             if value is None:
                 continue
@@ -41,7 +45,7 @@ class AiohttpSession(BaseSession):
         form = self.build_form_data(request)
 
         async with self._session.post(url, data=form) as response:
-            raw_result = await response.json()
+            raw_result = await response.json(loads=self.json_loads)
 
         response = call.build_response(raw_result)
         self.raise_for_status(response)
diff --git a/aiogram/api/session/base.py b/aiogram/api/session/base.py
index abfb1860..1c9ec27d 100644
--- a/aiogram/api/session/base.py
+++ b/aiogram/api/session/base.py
@@ -2,7 +2,7 @@ import abc
 import asyncio
 import datetime
 import json
-from typing import TypeVar, Union, Any, List, Dict
+from typing import TypeVar, Union, Any, List, Dict, Optional, Callable
 
 from pydantic.dataclasses import dataclass
 
@@ -31,8 +31,16 @@ PRODUCTION = TelegramAPIServer(
 
 class BaseSession(abc.ABC):
     def __init__(
-        self, api: TelegramAPIServer = PRODUCTION, json_loads=json.loads, json_dumps=json.dumps
+        self,
+        api: TelegramAPIServer = PRODUCTION,
+        json_loads: Optional[Callable] = None,
+        json_dumps: Optional[Callable] = None,
     ):
+        if json_loads is None:
+            json_loads = json.loads
+        if json_dumps is None:
+            json_dumps = json.dumps
+
         self.api = api
         self.json_loads = json_loads
         self.json_dumps = json_dumps