diff --git a/CHANGELOG.md b/CHANGELOG.md
index 93dbc52..9d7c66f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [dev] - YYYY-MM-DD
+## [0.4.0] - 2026-04-16
 ### Added
 * Added `patch_numpy_umath` and `restore_numpy_umath` functions for patching NumPy, and improved the patching implementation [gh-170](https://github.com/IntelPython/mkl_umath/pull/170)
 
diff --git a/conda-recipe-cf/meta.yaml b/conda-recipe-cf/meta.yaml
index 76a6125..e2d14aa 100644
--- a/conda-recipe-cf/meta.yaml
+++ b/conda-recipe-cf/meta.yaml
@@ -1,4 +1,4 @@
-{% set version = "0.4.0dev4" %}
+{% set version = "0.4.0" %}
 {% set buildnumber = 0 %}
 
 package:
diff --git a/mkl_umath/_version.py b/mkl_umath/_version.py
index 165668c..6a9beea 100644
--- a/mkl_umath/_version.py
+++ b/mkl_umath/_version.py
@@ -1 +1 @@
-__version__ = "0.4.0dev4"
+__version__ = "0.4.0"