diff --git a/app/Endpoint/Api/Http/Resources/ProductSku/ProductSkuSimpleResource.php b/app/Endpoint/Api/Http/Resources/ProductSku/ProductSkuSimpleResource.php
index ef2eee86..5b631c50 100644
--- a/app/Endpoint/Api/Http/Resources/ProductSku/ProductSkuSimpleResource.php
+++ b/app/Endpoint/Api/Http/Resources/ProductSku/ProductSkuSimpleResource.php
@@ -19,7 +19,7 @@ class ProductSkuSimpleResource extends JsonResource
             'name' => $this->name,
             'cover' => (string) $this->cover,
             'sell_price' => $this->sell_price,
-            'vip_price' => $this->vip_price,
+            'vip_price' => (string) $this->vip_price,
             'sales' => $this->sales,
         ];
     }