diff --git a/models/deal_group.py b/models/deal_group.py
index cd130b5..6bbb26b 100644
--- a/models/deal_group.py
+++ b/models/deal_group.py
@@ -20,7 +20,7 @@ class DealGroup(BaseModel):
     lexorank: Mapped[str] = mapped_column(
         nullable=False
     )
-    deals: Mapped["Deal"] = relationship(
+    deals: Mapped[list["Deal"]] = relationship(
         back_populates='group',
         secondary='deal_relations'
     )