diff --git a/src/DataStructures/StrictList.php b/src/DataStructures/StrictList.php
index 6346ba1..14adceb 100644
--- a/src/DataStructures/StrictList.php
+++ b/src/DataStructures/StrictList.php
@@ -32,6 +32,8 @@ use OCC\Basics\Traits\Getter;
  * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
  * @package opencultureconsulting/basics
  *
+ * @property-read string[] $allowedTypes
+ *
  * @template AllowedType
  * @extends SplDoublyLinkedList<AllowedType>
  */
diff --git a/src/DataStructures/StrictQueue.php b/src/DataStructures/StrictQueue.php
index e7a5f01..10c9c14 100644
--- a/src/DataStructures/StrictQueue.php
+++ b/src/DataStructures/StrictQueue.php
@@ -30,6 +30,8 @@ use RuntimeException;
  * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
  * @package opencultureconsulting/basics
  *
+ * @property-read string[] $allowedTypes
+ *
  * @template AllowedType
  * @extends StrictList<AllowedType>
  */
diff --git a/src/DataStructures/StrictStack.php b/src/DataStructures/StrictStack.php
index 65df471..965af6d 100644
--- a/src/DataStructures/StrictStack.php
+++ b/src/DataStructures/StrictStack.php
@@ -30,6 +30,8 @@ use RuntimeException;
  * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
  * @package opencultureconsulting/basics
  *
+ * @property-read string[] $allowedTypes
+ *
  * @template AllowedType
  * @extends StrictList<AllowedType>
  */