diff --git a/theme/boost/upgrade.txt b/theme/boost/upgrade.txt
index 23c4150e582..696d3b8512f 100644
--- a/theme/boost/upgrade.txt
+++ b/theme/boost/upgrade.txt
@@ -1,6 +1,12 @@
 This file describes API changes in /theme/boost
 information provided here is intended especially for theme designers.
 
+=== 4.4.4 ===
+* The `.page-header-headings` CSS class now has a background colour applied to the maintenance and secure layouts.
+  You may need to override this class in your maintenance and secure layouts if both of the following are true:
+  * Your theme plugin inherits from `theme_boost` and uses this CSS class
+  * Your theme plugin applies a different styling for the page header for the maintenance and secure layouts
+
 === 4.4 ===
 * Bootstrap badge color helper clases (badge-[primary|secondary|...]) are no longer used, use bg-[primary|secondary|...] instead.
 * Bootstrap badge-pill is no longer used, use rounded-pill instead.