diff --git a/Models/Group.php b/Models/Group.php
index 6b4a230..ee89a57 100755
--- a/Models/Group.php
+++ b/Models/Group.php
@@ -27,7 +27,7 @@ class Group extends \phpOMS\Account\Group
     /**
      * Created at.
      *
-     * @var \DateTime
+     * @var \DateTimeImmutable
      * @since 1.0.0
      */
     protected \DateTimeImmutable $createdAt;
diff --git a/Models/Module.php b/Models/Module.php
index 386fbc3..85ed7f0 100755
--- a/Models/Module.php
+++ b/Models/Module.php
@@ -62,7 +62,7 @@ class Module
     /**
      * Created at.
      *
-     * @var \DateTime
+     * @var \DateTimeImmutable
      * @since 1.0.0
      */
     protected \DateTimeImmutable $createdAt;