diff --git a/src/Header/Column.php b/src/Header/Column.php
index 8b90602..dcbf8dc 100644
--- a/src/Header/Column.php
+++ b/src/Header/Column.php
@@ -14,6 +14,7 @@
  * @property int $mdxFlag
  * @property int $nextAI
  */
+#[\AllowDynamicProperties]
 class Column
 {
     /** @var string */