diff --git a/docs/extensions/listings/custom-formats.yml b/docs/extensions/listings/custom-formats.yml
index a12839c1e..7b8e7e70f 100644
--- a/docs/extensions/listings/custom-formats.yml
+++ b/docs/extensions/listings/custom-formats.yml
@@ -1,3 +1,9 @@
+- name: lumo
+  path: https://github.com/holtzy/lumo
+  author: "[Holtz Yan](https:www.yan-holtz.com)"
+  description: |
+    A clean and minimalist HTML custom format
+
 - name: quarto-preprint
   path: https://github.com/mvuorre/quarto-preprint
   author: "[Matti Vuorre](https://github.com/mvuorre)"