diff --git a/src/Controller/UploadController.php b/src/Controller/UploadController.php
index fb08090..61bf064 100644
--- a/src/Controller/UploadController.php
+++ b/src/Controller/UploadController.php
@@ -4,6 +4,7 @@ namespace Drupal\dropzonejs\Controller;

 use Drupal\Core\Ajax\AjaxResponse;
 use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\File\FileSystem;
 use Drupal\dropzonejs\UploadException;
 use Drupal\dropzonejs\UploadHandlerInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
@@ -68,7 +69,7 @@ class UploadController extends ControllerBase {
       // Return JSON-RPC response.
       return new AjaxResponse([
         'jsonrpc' => '2.0',
-        'result' => basename($this->uploadHandler->handleUpload($file)),
+        'result' => FileSystem::basename($this->uploadHandler->handleUpload($file)),
         'id' => 'id',
       ]);
     }