diff --git a/aiogram/utils/handlers_in_use.py b/aiogram/utils/handlers_in_use.py
index 0bf63000..a690f461 100644
--- a/aiogram/utils/handlers_in_use.py
+++ b/aiogram/utils/handlers_in_use.py
@@ -1,4 +1,3 @@
-
 from aiogram.dispatcher.router import Router
 from itertools import chain
 from typing import List, cast