diff --git a/src/apps/parsers/checko_collection.py b/src/apps/parsers/checko_collection.py
index ab04a0b..033740f 100644
--- a/src/apps/parsers/checko_collection.py
+++ b/src/apps/parsers/checko_collection.py
@@ -10,7 +10,9 @@ def collection_period_month(at: date | datetime | None = None) -> date:
     if at is None:
         local_date = timezone.localdate()
     elif isinstance(at, datetime):
-        local_date = timezone.localtime(at).date() if timezone.is_aware(at) else at.date()
+        local_date = (
+            timezone.localtime(at).date() if timezone.is_aware(at) else at.date()
+        )
     else:
         local_date = at
     return local_date.replace(day=1)