diff --git a/src/Markup.php b/src/Markup.php
index 231a29b4121..1788acc4f73 100644
--- a/src/Markup.php
+++ b/src/Markup.php
@@ -41,6 +41,9 @@ public function count()
         return mb_strlen($this->content, $this->charset);
     }
 
+    /**
+     * @return mixed
+     */
     #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
diff --git a/src/Util/TemplateDirIterator.php b/src/Util/TemplateDirIterator.php
index 8125341bd81..3bef14beec3 100644
--- a/src/Util/TemplateDirIterator.php
+++ b/src/Util/TemplateDirIterator.php
@@ -16,12 +16,18 @@
  */
 class TemplateDirIterator extends \IteratorIterator
 {
+    /**
+     * @return mixed
+     */
     #[\ReturnTypeWillChange]
     public function current()
     {
         return file_get_contents(parent::current());
     }
 
+    /**
+     * @return mixed
+     */
     #[\ReturnTypeWillChange]
     public function key()
     {