diff --git a/CHANGELOG.md b/CHANGELOG.md
index f808ef7..b072aaa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to this project 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).
 
-## Unreleased
+## [v0.9.0](https://github.com/ameily/cincoconfig/releases/tag/v0.9.0) - 2023-04-23
 ### Added
 - New support method, `is_value_defined` to check if a config field value is defined by the user,
   through either a loaded config file or the API.
diff --git a/cincoconfig/VERSION b/cincoconfig/VERSION
index a3df0a6..ac39a10 100644
--- a/cincoconfig/VERSION
+++ b/cincoconfig/VERSION
@@ -1 +1 @@
-0.8.0
+0.9.0
diff --git a/pyproject.toml b/pyproject.toml
index 75efdcd..1b05068 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "cincoconfig"
-version = "0.8.0"
+version = "0.9.0"
 description = "Universal configuration file parser"
 authors = ["Adam Meily <meily.adam@gmail.com>"]
 readme = "README.md"