diff --git a/src/Controller/UploadController.php b/src/Controller/UploadController.php
index 2d9415635e689e6194efd12b833fb09f3af3565f..c07aa4eb86f95c86994ae5308d91f85e32e8e36b 100644
--- a/src/Controller/UploadController.php
+++ b/src/Controller/UploadController.php
@@ -91,7 +91,7 @@ class UploadController extends Controller
      *
      * @return JsonResponse
      */
-    public function createAction(Request $request)
+    public function createAction(Request $request): JsonResponse
     {
         $request->setRequestFormat(self::REQUEST_FORMAT);
         $data = $request->request->get('file');
@@ -136,7 +136,7 @@ class UploadController extends Controller
      *
      * @return JsonResponse|Response
      */
-    public function putContentAction(Request $request, UploadedFile $file)
+    public function putContentAction(Request $request, UploadedFile $file): Response
     {
         $request->setRequestFormat(self::REQUEST_FORMAT);
         $this->validateCsrfToken($request);
@@ -160,7 +160,7 @@ class UploadController extends Controller
      *
      * @return array
      */
-    protected function handleRangeHeader(Request $request)
+    protected function handleRangeHeader(Request $request): array
     {
         if (!$request->headers->has('Content-Range')) {
             return [0, PHP_INT_MAX, true];
@@ -188,7 +188,7 @@ class UploadController extends Controller
      *
      * @return Response
      */
-    protected function completeUpload(UploadedFileInterface $file)
+    protected function completeUpload(UploadedFileInterface $file): Response
     {
         try {
             $this->fileManager->completed($file);
@@ -222,7 +222,7 @@ class UploadController extends Controller
      *
      * @return UploadedFileResponse
      */
-    public function getContentAction(Request $request, UploadedFile $file)
+    public function getContentAction(Request $request, UploadedFile $file): UploadedFileResponse
     {
         $this->validateCsrfToken($request);
 
@@ -245,7 +245,7 @@ class UploadController extends Controller
      *
      * @return JsonResponse
      */
-    public function deleteAction(Request $request, UploadedFile $file)
+    public function deleteAction(Request $request, UploadedFile $file): JsonResponse
     {
         $request->setRequestFormat(self::REQUEST_FORMAT);
 
@@ -261,7 +261,7 @@ class UploadController extends Controller
      *
      * @throws HttpException
      */
-    protected function validateCsrfToken(Request $request)
+    protected function validateCsrfToken(Request $request): void
     {
         $token = $this->csrfTokenManager->getToken($request->query->get('token'));
         if (!$this->csrfTokenManager->isTokenValid($token)) {
@@ -277,7 +277,7 @@ class UploadController extends Controller
      *
      * @return JsonResponse
      */
-    protected function createResponse($status = Response::HTTP_OK, $message = 'OK', array $data = [], array $headers = [])
+    protected function createResponse($status = Response::HTTP_OK, $message = 'OK', array $data = [], array $headers = []): JsonResponse
     {
         $data['status'] = $status;
         $data['message'] = $message;