diff --git a/src/DirectoryListing.php b/src/DirectoryListing.php
index 7b1a1f589..a1e8d837f 100644
--- a/src/DirectoryListing.php
+++ b/src/DirectoryListing.php
@@ -10,7 +10,8 @@
 use Traversable;
 
 /**
- * @template T
+ * @template-covariant T of StorageAttributes
+ * @implements IteratorAggregate<T>
  */
 class DirectoryListing implements IteratorAggregate
 {
@@ -40,7 +41,7 @@ public function filter(callable $filter): DirectoryListing
     }
 
     /**
-     * @template R
+     * @template R of StorageAttributes
      *
      * @param callable(T): R $mapper
      *