diff --git a/Models/Promotion.php b/Models/Promotion.php
index dec0e56..52d57b9 100755
--- a/Models/Promotion.php
+++ b/Models/Promotion.php
@@ -75,7 +75,7 @@ class Promotion
     /**
      * Created at.
      *
-     * @var \DateTime
+     * @var \DateTimeImmutable
      * @since 1.0.0
      */
     private \DateTimeImmutable $createdAt;