diff --git a/CHANGELOG.md b/CHANGELOG.md
index 269d538..cb872de 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
 CHANGELOG
 =========
 
+## v1.3 - 7/2/2026
+
+Went to inordinate lengths to apply the partition of the 600-cell (into five
+24-cells) to the 5-cell inscription in the 120-cell, so that they could be coloured
+in a way which reveals some of that symmetry.
+
 ## v1.2 - 18/1/2026
 
 Added a second visualisation of the 120-cell's 5-cells without the 120-cell links
diff --git a/index.html b/index.html
index b58cb6b..e9221ea 100644
--- a/index.html
+++ b/index.html
@@ -36,7 +36,7 @@
 		<script type="module" src="/main.js"></script>
 		<div id="description"></div>
 		<div id="release_notes"></div>
-		<div id="info"><a href="#" id="show_notes">release 1.2</a> |
+		<div id="info"><a href="#" id="show_notes">release 1.3</a> |
 
     		by <a target="_blank" href="https://mikelynch.org/">Mike Lynch</a> |
 			<a target="_blank" href="https://git.tilde.town/bombinans/fourdjs">source</a></div>
diff --git a/main.js b/main.js
index e24abc2..054683a 100644
--- a/main.js
+++ b/main.js
@@ -1,6 +1,12 @@
 import * as THREE from 'three';
 
 const RELEASE_NOTES = `
+<p><b>v1.3 - 7/2/2026</b></p>
+
+<p>Went to inordinate lengths to apply the partition of the 600-cell (into five
+24-cells) to the 5-cell inscription in the 120-cell, so that they could be coloured
+in a way which reveals some of that symmetry.</p>
+
 <p><b>v1.2 - 18/1/2026</b></p>
 
 <p>Added a second visualisation of the 120-cell's 5-cells without the 120-cell links and with more colours added so you can get a sense of the individual 5-cells.</p>