diff --git a/config/sync/core.extension.yml b/config/sync/core.extension.yml
index 62de995..fa833e1 100644
--- a/config/sync/core.extension.yml
+++ b/config/sync/core.extension.yml
@@ -10,6 +10,7 @@ module:
   breakpoint: 0
   checklistapi: 0
   ckeditor: 0
+  classitup: 0
   color: 0
   comment: 0
   components: 0