diff --git a/lib/upgrade.txt b/lib/upgrade.txt
index 5d85b1306e4..0074a5ec3d9 100644
--- a/lib/upgrade.txt
+++ b/lib/upgrade.txt
@@ -79,6 +79,7 @@ information provided here is intended especially for developers.
   Course formats using components will be allowed to use one level indentation only.
 * The method `flexible_table::set_columnsattributes` now can be used with 'class' key to add custom classes to the DOM.
 * The editor_tinymce plugin has been removed from core.
+* Cron utility functions have been moved from the global namespaces to the \core\cron class.
 
 === 4.1 ===