diff --git a/CHANGELOG.md b/CHANGELOG.md
index 42cc677..d8f3a35 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,13 +1,20 @@
 # Changelog
 ## [Unreleased]
 
-## [02.52.18] --- 2026-06-30
+### Added
+- Cancel Stalled toolbar button on Backup Records view to cancel backups stuck in "running" status
+- New ACL permission `mokosuitebackup.backup.cancel` for cancel stalled action
+- AJAX endpoint `ajax.cancelBackup` for programmatic/API cancel
+- Auto-timeout failsafe: preflight auto-cancels "running" backups older than 30 minutes
+- Pre-extension-update backup progress modal (Bootstrap 5 modal with stepped AJAX progress bar)
+
+### Fixed
+- Pre-update backup ran synchronously with no browser feedback — page hung until complete
+- Stalled backups permanently blocked future backups for the same profile
+- Preflight error message now directs users to Cancel Stalled action
 
 ## [02.52.18] --- 2026-06-30
 
-## [01.45.00] --- 2026-06-28
-
-
 ## [01.45.00] --- 2026-06-28
 
 ## [01.43.35] --- 2026-06-28