diff --git a/src/bot/db/model.py b/src/bot/db/model.py
index 6e5d7e7..ac8687a 100644
--- a/src/bot/db/model.py
+++ b/src/bot/db/model.py
@@ -128,7 +128,10 @@ class BaseModel(peewee.Model):
 
     @classmethod
     def bulk_update(
-        cls, model_list: Iterable[Self], fields: Iterable, batch_size: int | None = None
+        cls,
+        model_list: Iterable[Self],
+        fields: Iterable[peewee.Field | str],
+        batch_size: int | None = None,
     ):
         def lazy(models: Iterable[Self]) -> Iterable[Self]:
             now = datetime.now()