diff --git a/app/Service/Api/Order/PlaceOrderService.php b/app/Service/Api/Order/PlaceOrderService.php
index a90d279..8303753 100644
--- a/app/Service/Api/Order/PlaceOrderService.php
+++ b/app/Service/Api/Order/PlaceOrderService.php
@@ -20,7 +20,7 @@ class PlaceOrderService extends BaseOrderService
      * @throws ContainerExceptionInterface
      * @throws NotFoundExceptionInterface
      */
-    public function handle()
+    public function handle(): array
     {
         $this->siteId = (int)$this->request->input('site_id');
         $this->couponId = (int)$this->request->input('coupon_id',0);