diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9dcd8cde..66d22d1f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,17 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## 4.0.0 - 2025-12-09
+
+### Added
+- add watermark and metadata to generated images and audio @marcelklehr [#295](https://github.com/nextcloud/integration_openai/pull/295)
+- adjust audio input chat format @julien-nc [#303](https://github.com/nextcloud/integration_openai/pull/303)
+- detect audio input format when sending it as a message to the chat completion endpoint, support wav and mp3 @julien-nc [#306](https://github.com/nextcloud/integration_openai/pull/306)
+
+### Changed
+- drop support for NC < 33 @marcelklehr [#295](https://github.com/nextcloud/integration_openai/pull/295)
+
+
 ## 3.9.1 – 2025-11-05
 
 ### Fixed
diff --git a/appinfo/info.xml b/appinfo/info.xml
index 00c7c957..8f26d1c2 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -101,7 +101,7 @@ Negative:
 
 Learn more about the Nextcloud Ethical AI Rating [in our blog](https://nextcloud.com/blog/nextcloud-ethical-ai-rating/).
 ]]>	</description>
-	<version>4.0.0-dev</version>
+	<version>4.0.0</version>
 	<licence>agpl</licence>
 	<author>Julien Veyssier</author>
 	<namespace>OpenAi</namespace>