diff --git a/DependencyInjection/IrsteaFileUploadExtension.php b/DependencyInjection/IrsteaFileUploadExtension.php
index 43f8a375144241c714b88424225ddf51c2fa30df..c99294afc08d20f6fb5614c139e3a272b5716861 100644
--- a/DependencyInjection/IrsteaFileUploadExtension.php
+++ b/DependencyInjection/IrsteaFileUploadExtension.php
@@ -67,10 +67,8 @@ class IrsteaFileUploadExtension extends Extension implements PrependExtensionInt
         $container->prependExtensionConfig(
             'twig',
             [
-                'form' => [
-                    'resources' => [
-                        'IrsteaFileUploadBundle:Form:file_upload.html.twig',
-                    ],
+                'form_thmes' => [
+                    'IrsteaFileUploadBundle:Form:file_upload.html.twig',
                 ],
             ]
         );