diff --git a/kitty/marks.py b/kitty/marks.py
index 90cf23f3f..01bea441a 100644
--- a/kitty/marks.py
+++ b/kitty/marks.py
@@ -9,7 +9,6 @@ from typing import Union
 from .fast_data_types import set_uint_at_address
 from .utils import resolve_custom_file
 
-
 MarkerFunc = Callable[[str, int, int, int], Generator[None, None, None]]