diff --git a/examples/callback_data_factory.py b/examples/callback_data_factory.py
index 2335ea95..c95860f1 100644
--- a/examples/callback_data_factory.py
+++ b/examples/callback_data_factory.py
@@ -1,6 +1,7 @@
 import logging
 import random
 import uuid
+import typing
 
 from aiogram import Bot, Dispatcher, executor, md, types
 from aiogram.contrib.fsm_storage.memory import MemoryStorage
@@ -52,7 +53,7 @@ def format_post(post_id: str, post: dict) -> (str, types.InlineKeyboardMarkup):
         md.quote_html(post['body']),
         '',  # just new empty line
         f"Votes: {post['votes']}",
-        sep = '\n',
+        sep='\n',
     )
 
     markup = types.InlineKeyboardMarkup()
@@ -75,7 +76,7 @@ async def query_show_list(query: types.CallbackQuery):
 
 
 @dp.callback_query_handler(posts_cb.filter(action='view'))
-async def query_view(query: types.CallbackQuery, callback_data: dict):
+async def query_view(query: types.CallbackQuery, callback_data: typing.Dict[str, str]):
     post_id = callback_data['id']
 
     post = POSTS.get(post_id, None)
@@ -87,7 +88,7 @@ async def query_view(query: types.CallbackQuery, callback_data: dict):
 
 
 @dp.callback_query_handler(posts_cb.filter(action=['like', 'dislike']))
-async def query_post_vote(query: types.CallbackQuery, callback_data: dict):
+async def query_post_vote(query: types.CallbackQuery, callback_data: typing.Dict[str, str]):
     try:
         await dp.throttle('vote', rate=1)
     except Throttled:
diff --git a/examples/callback_data_factory_simple.py b/examples/callback_data_factory_simple.py
index a6d246d5..d8c1a327 100644
--- a/examples/callback_data_factory_simple.py
+++ b/examples/callback_data_factory_simple.py
@@ -4,6 +4,7 @@ For more comprehensive example see callback_data_factory.py
 """
 
 import logging
+import typing
 
 from aiogram import Bot, Dispatcher, executor, types
 from aiogram.contrib.middlewares.logging import LoggingMiddleware
@@ -38,7 +39,7 @@ async def cmd_start(message: types.Message):
 
 
 @dp.callback_query_handler(vote_cb.filter(action=['up', 'down']))
-async def callback_vote_action(query: types.CallbackQuery, callback_data: dict):
+async def callback_vote_action(query: types.CallbackQuery, callback_data: typing.Dict[str, str]):
     logging.info('Got this callback data: %r', callback_data)  # callback_data contains all info from callback data
     await query.answer()  # don't forget to answer callback query as soon as possible
     callback_data_action = callback_data['action']