diff --git a/config/sync/core.extension.yml b/config/sync/core.extension.yml
index 6449a4b..8f39682 100644
--- a/config/sync/core.extension.yml
+++ b/config/sync/core.extension.yml
@@ -11,6 +11,7 @@ module:
   block_visibility_groups: 0
   breakpoint: 0
   ckeditor: 0
+  ckeditor_markdown: 0
   coffee: 0
   color: 0
   comment: 0