diff --git a/src/lootscraper/database.py b/src/lootscraper/database.py
index 3a3fef64..380000d1 100644
--- a/src/lootscraper/database.py
+++ b/src/lootscraper/database.py
@@ -296,10 +296,10 @@ def read_active_offers(
         self,
         time: datetime,
         *,
-        type_: str | None = None,
-        source: str | None = None,
-        duration: str | None = None,
-        last_offer_id: str | None = None,
+        type_: OfferType | None = None,
+        source: Source | None = None,
+        duration: OfferDuration | None = None,
+        last_offer_id: int | None = None,
     ) -> Sequence[Offer]:
         session: Session = self.Session()