diff --git a/symfony/stimulus-bundle/2.20/assets/controllers/csrf_protection_controller.js b/symfony/stimulus-bundle/2.20/assets/controllers/csrf_protection_controller.js
index 2811f210b..c722f024a 100644
--- a/symfony/stimulus-bundle/2.20/assets/controllers/csrf_protection_controller.js
+++ b/symfony/stimulus-bundle/2.20/assets/controllers/csrf_protection_controller.js
@@ -1,5 +1,5 @@
 const nameCheck = /^[-_a-zA-Z0-9]{4,22}$/;
-const tokenCheck = /^[-_\/+a-zA-Z0-9]{24,}$/;
+const tokenCheck = /^[-_/+a-zA-Z0-9]{24,}$/;
 
 // Generate and double-submit a CSRF token in a form field and a cookie, as defined by Symfony's SameOriginCsrfTokenManager
 document.addEventListener('submit', function (event) {