diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78f372d..e24d6a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## [1.5.12-beta9] - 2025-08-29
+### Added
+- update vendor and filament ID handling to use NULL and add delays for stability
+
+### Changed
+- update platformio.ini for beta version v1.5.12-beta9
+
+
 ## [1.5.12-beta8] - 2025-08-29
 ### Added
 - add delay to ensure proper setting of vendor and filament IDs after API state changes