diff --git a/CHANGES.rst b/CHANGES.rst
index 8c21087c..a4ee19d5 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,7 +1,7 @@
 Changelog
 =========
 
-4.0.3 (unreleased)
+4.0.3 (2018-10-10)
 ------------------
 
 Bug fixes:
diff --git a/src/icalendar/__init__.py b/src/icalendar/__init__.py
index 02d468de..7c2bfb91 100644
--- a/src/icalendar/__init__.py
+++ b/src/icalendar/__init__.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-__version__ = '4.0.3.dev0'
+__version__ = '4.0.3'
 
 from icalendar.cal import (
     Calendar,