diff --git a/tutorial-php-ddd-cqrs-event-sourcing/php-asynchronous-processing.md b/tutorial-php-ddd-cqrs-event-sourcing/php-asynchronous-processing.md
index 4396531..8e2182f 100644
--- a/tutorial-php-ddd-cqrs-event-sourcing/php-asynchronous-processing.md
+++ b/tutorial-php-ddd-cqrs-event-sourcing/php-asynchronous-processing.md
@@ -28,6 +28,7 @@ namespace App\Domain\Order;
 class PlaceOrderCommand
 {
     private int $orderId;
+
     /**
      * @var int[]
      */