diff --git a/teams/models.py b/teams/models.py
index 60dd451..8f07eda 100644
--- a/teams/models.py
+++ b/teams/models.py
@@ -58,7 +58,13 @@ class Season(RulesModel):
         return season
 
     @classmethod
-    def generate_default(cls, day: int = config.TF_DEFAULT_SEASON_DAY, month: int = config.TF_DEFAULT_SEASON_MONTH, duration: str = config.TF_DEFAULT_SEASON_DURATION) -> "Season":
+    def generate_default(cls, day: int | None = None, month: int | None = None, duration: str | None = None) -> "Season":
+        if day is None:
+            day = config.TF_DEFAULT_SEASON_DAY
+        if month is None:
+            month = config.TF_DEFAULT_SEASON_MONTH
+        if duration is None:
+            duration = config.TF_DEFAULT_SEASON_DURATION
         current_year = timezone.now().date().year
         start_date = datetime.date(current_year, month, day)