diff --git a/src/feed.py b/src/feed.py
index 706756d..565f607 100644
--- a/src/feed.py
+++ b/src/feed.py
@@ -197,7 +197,7 @@ class RSSFeed:
     description: str
     link: str
     lang: str
-    last_build_date: datetime
+    last_build_date: datetime | None
     image_href: str
     items: list[RSSItem] = None