diff --git a/core/modules/file/src/Controller/FileUploadController.php b/core/modules/file/src/Controller/FileUploadController.php
index 0bbc8e0..cd3be96 100644
--- a/core/modules/file/src/Controller/FileUploadController.php
+++ b/core/modules/file/src/Controller/FileUploadController.php
@@ -6,6 +6,7 @@
 use Drupal\Core\File\FileSystem;
 use Drupal\file\FileInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\Serializer\SerializerInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Exception\HttpException;
@@ -19,14 +20,18 @@ class FileUploadController extends ControllerBase {
    * @var \Drupal\Core\File\FileSystem
    */
   protected $fileSystem;
+  protected $serializer;
 
   /**
    * Constructs a FileUploadController instance.
    *
    * @param \Drupal\Core\File\FileSystem $file_system
+   * @param Symfony\Component\Serializer\SerializerInterface $serializer
+   *
    */
-  public function __construct(FileSystem $file_system) {
+  public function __construct(FileSystem $file_system, SerializerInterface $serializer) {
     $this->fileSystem = $file_system;
+    $this->serializer = $serializer;
   }
 
   /**
@@ -34,7 +39,8 @@ public function __construct(FileSystem $file_system) {
    */
   public static function create(ContainerInterface $container) {
     return new static(
-      $container->get('file_system')
+      $container->get('file_system'),
+      $container->get('serializer')
     );
   }
 
@@ -59,7 +65,9 @@ public function upload(Request $request, FileInterface $file) {
     // Save the file so file size is re-calculated.
     $file->save();
 
-    return new Response('OK');
+    // Prepare response.
+    $normalized_file = $this->serializer->normalize($file);
+    return new Response($this->serializer->encode($normalized_file, 'json'));
   }
 
   /**