diff --git a/aiogram/dispatcher/webhook.py b/aiogram/dispatcher/webhook.py
index 10a4b3c1..c739a789 100644
--- a/aiogram/dispatcher/webhook.py
+++ b/aiogram/dispatcher/webhook.py
@@ -9,7 +9,6 @@ from typing import Dict, List, Optional, Union
 from aiohttp import web
 from aiohttp.web_exceptions import HTTPGone
 
-
 from .. import types
 from ..bot import api
 from ..types import ParseMode
diff --git a/aiogram/types/encrypted_passport_element.py b/aiogram/types/encrypted_passport_element.py
index bc7b212b..76e02ec1 100644
--- a/aiogram/types/encrypted_passport_element.py
+++ b/aiogram/types/encrypted_passport_element.py
@@ -1,6 +1,7 @@
+import typing
+
 from . import base
 from . import fields
-import typing
 from .passport_file import PassportFile
 
 
diff --git a/aiogram/types/passport_data.py b/aiogram/types/passport_data.py
index 06cbad1c..2fed9fae 100644
--- a/aiogram/types/passport_data.py
+++ b/aiogram/types/passport_data.py
@@ -1,8 +1,9 @@
+import typing
+
 from . import base
 from . import fields
-import typing
-from .encrypted_passport_element import EncryptedPassportElement
 from .encrypted_credentials import EncryptedCredentials
+from .encrypted_passport_element import EncryptedPassportElement
 
 
 class PassportData(base.TelegramObject):
diff --git a/aiogram/types/venue.py b/aiogram/types/venue.py
index 1b420d57..f7b2a277 100644
--- a/aiogram/types/venue.py
+++ b/aiogram/types/venue.py
@@ -14,4 +14,3 @@ class Venue(base.TelegramObject):
     address: base.String = fields.Field()
     foursquare_id: base.String = fields.Field()
     foursquare_type: base.String = fields.Field()
-
diff --git a/aiogram/utils/auth_widget.py b/aiogram/utils/auth_widget.py
index 8b2eacf7..b9084eb1 100644
--- a/aiogram/utils/auth_widget.py
+++ b/aiogram/utils/auth_widget.py
@@ -4,11 +4,10 @@ for more information https://core.telegram.org/widgets/login#checking-authorizat
 
 Source: https://gist.github.com/JrooTJunior/887791de7273c9df5277d2b1ecadc839
 """
+import collections
 import hashlib
 import hmac
 
-import collections
-
 
 def generate_hash(data: dict, token: str) -> str:
     """
diff --git a/aiogram/utils/exceptions.py b/aiogram/utils/exceptions.py
index 9e3bb6d2..24afe356 100644
--- a/aiogram/utils/exceptions.py
+++ b/aiogram/utils/exceptions.py
@@ -174,7 +174,7 @@ class MessageTextIsEmpty(MessageError):
 
 class MessageCantBeEdited(MessageError):
     match = 'message can\'t be edited'
-    
+
 
 class MessageCantBeDeleted(MessageError):
     match = 'message can\'t be deleted'
@@ -429,5 +429,5 @@ class Throttled(TelegramAPIError):
 
     def __str__(self):
         return f"Rate limit exceeded! (Limit: {self.rate} s, " \
-               f"exceeded: {self.exceeded_count}, " \
-               f"time delta: {round(self.delta, 3)} s)"
+            f"exceeded: {self.exceeded_count}, " \
+            f"time delta: {round(self.delta, 3)} s)"
diff --git a/aiogram/utils/mixins.py b/aiogram/utils/mixins.py
index aa248cd9..776479bd 100644
--- a/aiogram/utils/mixins.py
+++ b/aiogram/utils/mixins.py
@@ -45,4 +45,3 @@ class ContextInstanceMixin:
         if not isinstance(value, cls):
             raise TypeError(f"Value should be instance of '{cls.__name__}' not '{type(value).__name__}'")
         cls.__context_instance.set(value)
-
diff --git a/examples/callback_data_factory.py b/examples/callback_data_factory.py
index d87ae1a3..3dd7d35e 100644
--- a/examples/callback_data_factory.py
+++ b/examples/callback_data_factory.py
@@ -49,9 +49,9 @@ def get_keyboard() -> types.InlineKeyboardMarkup:
 
 def format_post(post_id: str, post: dict) -> (str, types.InlineKeyboardMarkup):
     text = f"{md.hbold(post['title'])}\n" \
-           f"{md.quote_html(post['body'])}\n" \
-           f"\n" \
-           f"Votes: {post['votes']}"
+        f"{md.quote_html(post['body'])}\n" \
+        f"\n" \
+        f"Votes: {post['votes']}"
 
     markup = types.InlineKeyboardMarkup()
     markup.row(
diff --git a/examples/payments.py b/examples/payments.py
index d85e94ab..e8e37011 100644
--- a/examples/payments.py
+++ b/examples/payments.py
@@ -2,10 +2,9 @@ import asyncio
 
 from aiogram import Bot
 from aiogram import types
-from aiogram.utils import executor
 from aiogram.dispatcher import Dispatcher
 from aiogram.types.message import ContentTypes
-
+from aiogram.utils import executor
 
 BOT_TOKEN = 'BOT TOKEN HERE'
 PAYMENTS_PROVIDER_TOKEN = '123456789:TEST:1234567890abcdef1234567890abcdef'
diff --git a/examples/webhook_example.py b/examples/webhook_example.py
index fb0046ef..86520988 100644
--- a/examples/webhook_example.py
+++ b/examples/webhook_example.py
@@ -76,7 +76,8 @@ async def unknown(message: types.Message):
     """
     Handler for unknown messages.
     """
-    return SendMessage(message.chat.id, f"I don\'t know what to do with content type `{message.content_type()}`. Sorry :c")
+    return SendMessage(message.chat.id,
+                       f"I don\'t know what to do with content type `{message.content_type()}`. Sorry :c")
 
 
 async def cmd_id(message: types.Message):
diff --git a/tests/__init__.py b/tests/__init__.py
index cb0c6b9d..262c9395 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,4 +1,5 @@
 import aresponses
+
 from aiogram import Bot
 
 TOKEN = '123456789:AABBCCDDEEFFaabbccddeeff-1234567890'
diff --git a/tests/test_dispatcher.py b/tests/test_dispatcher.py
index 3dec03e7..6ebaf472 100644
--- a/tests/test_dispatcher.py
+++ b/tests/test_dispatcher.py
@@ -1,7 +1,7 @@
-from aiogram import Dispatcher, Bot
-
 import pytest
 
+from aiogram import Dispatcher, Bot
+
 pytestmark = pytest.mark.asyncio