diff --git a/src/Controller/RegisterController.php b/src/Controller/RegisterController.php
index cc03a2e..40c6192 100644
--- a/src/Controller/RegisterController.php
+++ b/src/Controller/RegisterController.php
@@ -62,8 +62,9 @@ public function register(): TrustedRedirectResponse {
     $url = $this->getRegisterUrl()->toString();
     $response = new TrustedRedirectResponse($url);
 
-    $cache = new CacheableMetadata();
-    $cache->addCacheContexts(['user.roles:anonymous']);
+    $cache = (new CacheableMetadata())
+      ->addCacheContexts(['user.roles:anonymous'])
+      ->setCacheTags(['config:oe_authentication.settings']);
     $response->addCacheableDependency($cache);
 
     return $response;