diff --git a/backend/app/services/product_service.py b/backend/app/services/product_service.py
index 47a5888..ee6b1b8 100644
--- a/backend/app/services/product_service.py
+++ b/backend/app/services/product_service.py
@@ -2,7 +2,7 @@
 from __future__ import annotations
 import uuid
 from fastapi import HTTPException, status
-from sqlalchemy import select, or_, cast, String, delete, update
+from sqlalchemy import select, or_, cast, String, delete, update, func
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload