diff --git a/content/05-Showcase/03-Harmogram/external.txt b/content/05-Showcase/03-Harmogram/external.txt
index f822c72..723a481 100644
--- a/content/05-Showcase/03-Harmogram/external.txt
+++ b/content/05-Showcase/03-Harmogram/external.txt
@@ -1,4 +1,4 @@
 ---
-link: http://www.harmogram.com/
+link: https://harmogram.com/
 description: This beautiful sound visualizer combines Paper.js with the HTML5 Audio API.
 ---