diff --git a/CHANGELOG.md b/CHANGELOG.md
index aaec7f56e..1963d8dca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this packages will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.1.129] - 2026-05-26
+
+### Fixed
+
+- Map missing fields in Chromeleon parser for adapter migration (#1207)
+
 ## [0.1.128] - 2026-05-21
 
 ### Fixed
diff --git a/src/allotropy/__about__.py b/src/allotropy/__about__.py
index c6a448714..7d3a8896e 100644
--- a/src/allotropy/__about__.py
+++ b/src/allotropy/__about__.py
@@ -1 +1 @@
-__version__ = "0.1.128"
+__version__ = "0.1.129"