diff --git a/CHANGELOG.md b/CHANGELOG.md
index 34882ad..3d5bc98 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [v1.2.9](https://github.com/jnoortheen/arger/releases/tag/v1.2.9) - 2021-01-27
+
+<small>[Compare with v1.2.8](https://github.com/jnoortheen/arger/compare/v1.2.8...v1.2.9)</small>
+
+### Bug Fixes
+- When `param:bool=true` used raises error ([1537b41](https://github.com/jnoortheen/arger/commit/1537b4189e0a4273ac33e469b1491560e2aafd05) by Noortheen Raja).
+
+
 ## [v1.2.8](https://github.com/jnoortheen/arger/releases/tag/v1.2.8) - 2021-01-02
 
 <small>[Compare with v1.2.7](https://github.com/jnoortheen/arger/compare/v1.2.7...v1.2.8)</small>
diff --git a/pyproject.toml b/pyproject.toml
index 87d6410..966a33f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [tool.poetry]
 
 name = "arger"
-version = "1.2.8"
+version = "1.2.9"
 description = "Create argparser automatically from functions"
 
 license = "MIT"