diff --git a/Models/Arrival.php b/Models/Arrival.php
index 934d2f6..b29625b 100644
--- a/Models/Arrival.php
+++ b/Models/Arrival.php
@@ -31,7 +31,7 @@ class Arrival
      * @var int
      * @since 1.0.0
      */
-    private $id = '';
+    private $id = 0;
 
     /**
      * Order.