diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c637dbb..8e852c6c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,8 +5,16 @@ All notable changes to the `tagpdf` package since the
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 this project uses date-based 'snapshot' version identifiers.
 
-## [2024-02-29]
+## [Unreleased]
+
+### Added 
+ - statistic and benchmark at the end of the run.
+ 
+### Changed
+ - speed up writing of StructElem 
 
+## [2024-02-29]
+Version 0.98x
 ### Added
  - structure destination is added OpenAction if present
  - new `viewer/startstructure` key to setup the OpenAction structure.