diff --git a/packages/Sarga/Shop/src/Repositories/ProductRepository.php b/packages/Sarga/Shop/src/Repositories/ProductRepository.php
index f73990a..9c5ea4e 100644
--- a/packages/Sarga/Shop/src/Repositories/ProductRepository.php
+++ b/packages/Sarga/Shop/src/Repositories/ProductRepository.php
@@ -67,7 +67,7 @@ class ProductRepository extends WProductRepository
         $product = $this->find($product);
 
         if (count($product->categories)) {
-            $qb->where('product_categories.category_id', $product->categories->first->id);
+            $qb->where('product_categories.category_id', $product->categories->first()->id);
         }
 
         return $qb->paginate($limit);
@@ -918,4 +918,4 @@ class ProductRepository extends WProductRepository
             ->get();
 
     }
-}
\ No newline at end of file
+}