diff --git a/CHANGELOG.md b/CHANGELOG.md
index 25b13858..878dc52d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ 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).
 
-## [Unreleased]
+## [4.5.0] - 2024-12-17
 
 ### Added
 
@@ -1150,8 +1150,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * initial
 
-[Unreleased]: https://github.com/Automattic/wordpress-activitypub/compare/4.4.0...trunk
+[Unreleased]: https://github.com/Automattic/wordpress-activitypub/compare/4.5.0...trunk
 <!-- Add new release below and update "Unreleased" link -->
+[4.5.0]: https://github.com/Automattic/wordpress-activitypub/compare/4.4.0...4.5.0
 [4.4.0]: https://github.com/Automattic/wordpress-activitypub/compare/4.3.0...4.4.0
 [4.3.0]: https://github.com/Automattic/wordpress-activitypub/compare/4.2.1...4.3.0
 [4.2.1]: https://github.com/Automattic/wordpress-activitypub/compare/4.2.0...4.2.1
diff --git a/activitypub.php b/activitypub.php
index 22f3c00e..3a7f3c75 100644
--- a/activitypub.php
+++ b/activitypub.php
@@ -3,7 +3,7 @@
  * Plugin Name: ActivityPub
  * Plugin URI: https://github.com/Automattic/wordpress-activitypub
  * Description: The ActivityPub protocol is a decentralized social networking protocol based upon the ActivityStreams 2.0 data format.
- * Version: 4.4.0
+ * Version: 4.5.0
  * Author: Matthias Pfefferle & Automattic
  * Author URI: https://automattic.com/
  * License: MIT
@@ -19,7 +19,7 @@
 
 use WP_CLI;
 
-\define( 'ACTIVITYPUB_PLUGIN_VERSION', '4.4.0' );
+\define( 'ACTIVITYPUB_PLUGIN_VERSION', '4.5.0' );
 
 // Plugin related constants.
 \define( 'ACTIVITYPUB_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
diff --git a/readme.txt b/readme.txt
index af69ee40..04c0c989 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@ Contributors: automattic, pfefferle, mattwiebe, obenland, akirk, jeherve, mediaf
 Tags: OStatus, fediverse, activitypub, activitystream
 Requires at least: 5.5
 Tested up to: 6.7
-Stable tag: 4.4.0
+Stable tag: 4.5.0
 Requires PHP: 7.0
 License: MIT
 License URI: http://opensource.org/licenses/MIT
@@ -132,7 +132,7 @@ For reasons of data protection, it is not possible to see the followers of other
 
 == Changelog ==
 
-= Unreleased =
+= 4.5.0 =
 
 * Improved: Reactions (likes and reposts) now enabled by default
 * Added: Reactions block to display likes and reposts
@@ -178,25 +178,6 @@ For reasons of data protection, it is not possible to see the followers of other
 * Fixed: Missing attachement-type for enclosures
 * Fixed: Prevention against self pings
 
-= 4.2.1 =
-
-* Added: Mastodon Apps status provider
-* Improved: Image-Handling
-* Improved: Have better checks if audience should be set or not
-* Fixed: Don't overwrite an existing `wp-tests-config.php`
-* Fixed: PHPCS for phpunit files
-
-= 4.2.0 =
-
-* Added: Unit tests for the `ActivityPub\Transformer\Post` class
-* Improved: Reuse constants once they're defined
-* Improved: "FEP-b2b8: Long-form Text" support
-* Improved: Admin notice for plain permalink settings is more user-friendly and actionable
-* Improved: Post-Formats support
-* Fixed: Do not display ActivityPub's user sub-menus to users who do not have the capabilities of writing posts.
-* Fixed: Proper margins for notices and font size for page title in settings screen.
-* Fixed: Ensure that `?author=0` resolves to blog user
-
 See full Changelog on [GitHub](https://github.com/Automattic/wordpress-activitypub/blob/trunk/CHANGELOG.md).
 
 == Upgrade Notice ==