diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2cf40a0..76a6db4 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ 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]
+
+## [0.4.0] - 2020-02-21
 ### Added
 - Doc tests for all events and few other structs.
 - `Originated` decorator.
diff --git a/Cargo.toml b/Cargo.toml
index 14e8aaf..bf30ff9 100755
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "weasel"
-version = "0.3.1"
+version = "0.4.0"
 authors = ["Trisfald <trisfald@gmail.com>"]
 edition = "2018"
 description = "A customizable battle system for turn-based games."