diff --git a/brother_ql_web/utils.py b/brother_ql_web/utils.py
index 9347c42..f4322cc 100644
--- a/brother_ql_web/utils.py
+++ b/brother_ql_web/utils.py
@@ -10,6 +10,7 @@
 
 if sys.version_info < (3, 9):
     from typing import Type
+
     BACKEND_TYPE = Type[BrotherQLBackendGeneric]
 else:
     BACKEND_TYPE = type[BrotherQLBackendGeneric]