diff --git a/src/aiogram_dialog/api/entities/modes.py b/src/aiogram_dialog/api/entities/modes.py
index f61b06b8..65f1c190 100644
--- a/src/aiogram_dialog/api/entities/modes.py
+++ b/src/aiogram_dialog/api/entities/modes.py
@@ -58,6 +58,7 @@ class StartMode(Enum):
         when a new sequence of operations is to be started alongside the
         current one.
     """
+
     NORMAL = "NORMAL"
     RESET_STACK = "RESET_STACK"
     NEW_STACK = "NEW_STACK"