diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0d6707..9572c6a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@ All notable changes to this project will be documented in this file.
 - 
 ### Added
 
+- Added tai and utc units for time values
+
 - Added a dependency on the [zlog](https://github.com/HardySimpson/zlog) logging library and replaced printf() with log messages
   Note that your application's main() must initialize the zlog library at startup.
   See the [zlog API](https://hardysimpson.github.io/zlog/UsersGuide-EN.html#sec:dzlog-API) for details.