diff --git a/backend/product/views.py b/backend/product/views.py
index 3538c5c..af4f94a 100644
--- a/backend/product/views.py
+++ b/backend/product/views.py
@@ -146,7 +146,12 @@ class AllProductsView(APIView):
         try:
             category_id = request.query_params.get('category', None)
             if category_id:
-                sub_category = get_object_or_404(SubCategoryModel, pk=int(category_id))
+                try:
+                    category_id = int(category_id)
+                except ValueError:
+                    return Response({'detail': 'value error category id should be a number'}, status=status.HTTP_400_BAD_REQUEST)
+
+                sub_category = get_object_or_404(SubCategoryModel, pk=category_id)
                 products = ProductModel.objects.filter(category=sub_category)
             else:
                 products = ProductModel.objects.all()