diff --git a/src/core/inline_calendar.py b/src/core/inline_calendar.py
index 72f1586..611dd14 100644
--- a/src/core/inline_calendar.py
+++ b/src/core/inline_calendar.py
@@ -111,7 +111,7 @@ def build_month_keyboard(current: date) -> InlineKeyboardMarkup:
     return InlineKeyboardMarkup(keyboard)
 
 
-def build_time_keyboard(selected: date, start_hour: int = 9, end_hour: int = 21, step_minutes: int = 60) -> InlineKeyboardMarkup:
+def build_time_keyboard(selected: date, start_hour: int = 9, end_hour: int = 21, step_minutes: int = 1src/core/inline_calendar.py0) -> InlineKeyboardMarkup:
     buttons: list[list[InlineKeyboardButton]] = []
     row: list[InlineKeyboardButton] = []
     current = datetime.combine(selected, datetime.min.time()).replace(hour=start_hour, minute=0)