diff --git a/CHANGELOG.md b/CHANGELOG.md
index 94e6c02..a34744f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 All notable changes to the [LibSA4Py](https://github.com/saltudelft/libsa4py) tool 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).
 
 ## [Unreleased]
+
+## [0.4.0] - 2023-05-08
 ### Added
 - Adds the `CountParametricTypeDepth` visitor to count the depth of parametric types.
 ### Fixed
diff --git a/libsa4py/__init__.py b/libsa4py/__init__.py
index f891948..b9e640b 100644
--- a/libsa4py/__init__.py
+++ b/libsa4py/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.3.0"
+__version__ = "0.4.0"
 
 # Package constants
 DEV_TYPE_ANNOT = 'D'