diff --git a/collections/demo-sources/index.md b/collections/demo-sources/index.md
index 03b3741f3924..5f21450d4559 100644
--- a/collections/demo-sources/index.md
+++ b/collections/demo-sources/index.md
@@ -32,6 +32,7 @@ items:
  - in4k/crawlspace
  - monadgroup/sy17
  - monadgroup/re19
+ - jumalauta/jml-engine-demos
 
 display_name: Demo sources
 ---