diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ccc033..c245b08 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,11 +6,18 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 ## [Unreleased]
 
 
+## [4.0.3] - 2024-07-17
+
+### Changed
+
+- Update release process.
+
 ## [4.0.2] - 2023-10-10
 
 ### Changed
 
 - Update release process. ([#148](https://github.com/heroku/heroku-java-metrics-agent/pull/148))
 
-[unreleased]: https://github.com/heroku/heroku-java-metrics-agent/compare/v4.0.2...HEAD
+[unreleased]: https://github.com/heroku/heroku-java-metrics-agent/compare/v4.0.3...HEAD
+[4.0.3]: https://github.com/heroku/heroku-java-metrics-agent/compare/v4.0.2...v4.0.3
 [4.0.2]: https://github.com/heroku/heroku-java-metrics-agent/compare/v4.0.1...v4.0.2
diff --git a/pom.xml b/pom.xml
index 810a90e..890c9a6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.heroku.agent</groupId>
     <artifactId>heroku-java-metrics-agent</artifactId>
-    <version>4.0.3-SNAPSHOT</version>
+    <version>4.0.3</version>
     <packaging>jar</packaging>
     <name>heroku-java-metrics-agent</name>
     <description>