diff --git a/drupal/composer.json b/drupal/composer.json
index 4fecf96..7ae0157 100644
--- a/drupal/composer.json
+++ b/drupal/composer.json
@@ -26,7 +26,7 @@
         "drush/drush": "11.2.1"
     },
     "require-dev": {
-        "drupal/core-dev": "9.4.7"
+        "drupal/core-dev": "11.3.5"
     },
     "conflict": {
         "drupal/drupal": "*"