diff --git a/config/install/editor.editor.filtered_html.yml b/config/install/editor.editor.filtered_html.yml
index 2ca1ffd4c58843304ef94926e86c33599f965dd3..7c784285ef0b5212a31be2a44abaddb214ed3cb8 100644
--- a/config/install/editor.editor.filtered_html.yml
+++ b/config/install/editor.editor.filtered_html.yml
@@ -24,6 +24,7 @@ settings:
   plugins:
     ckeditor5_heading:
       enabled_headings:
+        - heading1
         - heading2
         - heading3
         - heading4