diff --git a/composer.json b/composer.json
index 8b30cef..93d1acf 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
         "php": "^8.1",
         "composer-plugin-api": "^2.0",
         "codefog/contao-haste": "^5.2",
-        "contao/core-bundle": "^4.13.17 || ^5.1.1",
+        "contao/core-bundle": "^4.13.50 || ^5.3.14 || ^5.4.4",
         "doctrine/dbal": "^3.4",
         "doctrine/orm": "^2.19",
         "knplabs/knp-menu": "^3.1",
diff --git a/src/BulkyItem/BulkyItemStorage.php b/src/BulkyItem/BulkyItemStorage.php
index b18f488..f9401b5 100644
--- a/src/BulkyItem/BulkyItemStorage.php
+++ b/src/BulkyItem/BulkyItemStorage.php
@@ -4,6 +4,7 @@
 
 namespace Terminal42\NotificationCenterBundle\BulkyItem;
 
+use Contao\CoreBundle\Filesystem\ExtraMetadata;
 use Contao\CoreBundle\Filesystem\VirtualFilesystemException;
 use Contao\CoreBundle\Filesystem\VirtualFilesystemInterface;
 use Symfony\Component\Uid\Uuid;
@@ -32,7 +33,7 @@ public function store(BulkyItemInterface $item): string
             'class' => $item::class,
         ];
 
-        $this->filesystem->setExtraMetadata($voucher, ['storage_meta' => $meta]);
+        $this->filesystem->setExtraMetadata($voucher, new ExtraMetadata(['storage_meta' => $meta]));
 
         return $voucher;
     }
diff --git a/tests/BulkyItem/BulkItemStorageTest.php b/tests/BulkyItem/BulkItemStorageTest.php
index 793ed74..131314d 100644
--- a/tests/BulkyItem/BulkItemStorageTest.php
+++ b/tests/BulkyItem/BulkItemStorageTest.php
@@ -4,6 +4,7 @@
 
 namespace Terminal42\NotificationCenterBundle\Test\BulkyItem;
 
+use Contao\CoreBundle\Filesystem\ExtraMetadata;
 use Contao\CoreBundle\Filesystem\FilesystemItem;
 use Contao\CoreBundle\Filesystem\FilesystemItemIterator;
 use Contao\CoreBundle\Filesystem\VirtualFilesystemInterface;
@@ -56,14 +57,14 @@ function (string $voucher) {
                     },
                 ),
                 $this->callback(
-                    function (array $meta) {
+                    function (ExtraMetadata $meta) {
                         $this->assertArrayHasKey('storage_meta', $meta);
                         $this->assertSame([
                             'name' => 'foobar.png',
                             'type' => 'image/png',
                             'size' => 100,
-                        ], $meta['storage_meta']['item']);
-                        $this->assertSame(FileItem::class, $meta['storage_meta']['class']);
+                        ], $meta->get('storage_meta')['item']);
+                        $this->assertSame(FileItem::class, $meta->get('storage_meta')['class']);
 
                         return true;
                     },
@@ -98,7 +99,7 @@ public function testRetrieve(): void
             ->expects($this->once())
             ->method('get')
             ->with('a10aed4d-abe1-498f-adfc-b2e54fbbcbde')
-            ->willReturn(new FilesystemItem(true, 'foobar', null, null, null, [
+            ->willReturn(new FilesystemItem(true, 'foobar', null, null, null, new ExtraMetadata([
                 'storage_meta' => [
                     'item' => [
                         'name' => 'foobar.png',
@@ -107,7 +108,7 @@ public function testRetrieve(): void
                     ],
                     'class' => FileItem::class,
                 ],
-            ]))
+            ])))
         ;
 
         $vfs
diff --git a/tests/BulkyItem/InMemoryDbafs.php b/tests/BulkyItem/InMemoryDbafs.php
index 3c3568a..795e831 100644
--- a/tests/BulkyItem/InMemoryDbafs.php
+++ b/tests/BulkyItem/InMemoryDbafs.php
@@ -6,6 +6,7 @@
 
 use Contao\CoreBundle\Filesystem\Dbafs\ChangeSet\ChangeSet;
 use Contao\CoreBundle\Filesystem\Dbafs\DbafsInterface;
+use Contao\CoreBundle\Filesystem\ExtraMetadata;
 use Contao\CoreBundle\Filesystem\FilesystemItem;
 use Symfony\Component\Uid\Uuid;
 
@@ -17,7 +18,7 @@ class InMemoryDbafs implements DbafsInterface
     private array $records = [];
 
     /**
-     * @var array<string, array<mixed>>
+     * @var array<string, ExtraMetadata>
      */
     private array $meta = [];
 
@@ -35,7 +36,7 @@ public function getRecord(string $path): FilesystemItem|null
                 null,
                 null,
                 null,
-                $this->meta[$path] ?? [],
+                $this->meta[$path] ?? null,
             );
         }
 
@@ -47,7 +48,7 @@ public function getRecords(string $path, bool $deep = false): iterable
         throw new \RuntimeException('Not implemented');
     }
 
-    public function setExtraMetadata(string $path, array $metadata): void
+    public function setExtraMetadata(string $path, ExtraMetadata $metadata): void
     {
         $this->meta[$path] = $metadata;
     }