diff --git a/CHANGES.md b/CHANGES.md
index ab34de9..47c8b67 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,6 @@
 ## Changes
 
-## 4.0.3 (unreleased)
+## 4.0.3 (2024-05-17)
 
 
 - Fix #45: Packages with capital names do not get ignored when checked out.
diff --git a/pyproject.toml b/pyproject.toml
index a935849..b5a2486 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "mxdev"
 description = "Enable to work with Python projects containing lots of packages, of which you only want to develop some."
-version = "4.0.3.dev0"
+version = "4.0.3"
 keywords = ["pip", "vcs", "git", "development"]
 authors = [
   {name = "MX Stack Developers", email = "dev@bluedynamics.com" }