diff --git a/common/Controller/Web/Documentos.php b/common/Controller/Web/Documentos.php
index e4b9c05..1f50fd5 100644
--- a/common/Controller/Web/Documentos.php
+++ b/common/Controller/Web/Documentos.php
@@ -6,7 +6,7 @@ use Psr\Http\Message\ServerRequestInterface as Request;
 use Psr\Http\Message\ResponseInterface as Response;
 
 class Documentos {
-  public function existe(Request $request, Response $response, Container $container, $documento) {
+  public function existe(Request $request, Response $response, Container $container, $documento): Response {
     $filename = implode(DIRECTORY_SEPARATOR, [
       $container->get('folders.upload'),
       $documento . '.pdf'