diff --git a/src/Bundle/ChillMainBundle/Controller/SearchController.php b/src/Bundle/ChillMainBundle/Controller/SearchController.php
index 4c4b6d22c..09e558b0a 100644
--- a/src/Bundle/ChillMainBundle/Controller/SearchController.php
+++ b/src/Bundle/ChillMainBundle/Controller/SearchController.php
@@ -96,7 +96,7 @@ class SearchController extends AbstractController
         return $this->render('@ChillMain/Search/choose_list.html.twig');
     }
 
-    #[\Symfony\Component\Routing\Annotation\Route(path: '/{_locale}/search.{_format}', name: 'chill_main_search', requirements: ['_format' => 'html|json'], defaults: ['_format' => 'html'])]
+    #[\Symfony\Component\Routing\Annotation\Route(path: '/{_locale}/search.{_format}', name: 'chill_main_search', requirements: ['_format' => 'html|json', '_locale' => '[a-z]{1,3}'], defaults: ['_format' => 'html'])]
     public function searchAction(Request $request, mixed $_format)
     {
         $pattern = trim((string) $request->query->get('q', ''));