diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a70087..33c315f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,9 +12,13 @@ Versioning v2.0.0](https://semver.org/spec/v2.0.0.html).
 
 When considering the public API, we take into account the tool configuration and external requirements of the framework-dependent binary. Meaning that basically, breaking changes in configuration files, command-line syntax, or in the runtime requirements should be causing a major version increment.
 
-## [Unreleased] (4.0.0)
+## [4.0.0] - 2025-01-15
 ### Changed
 - **(Requirement update!)** Update to .NET 9.
+- Update all the used libraries.
+
+### Fixed
+- [#322: Broken Unicode message destroys the XMPP connection](https://github.com/codingteam/emulsion/issues/322).
 
 ## [3.0.0] - 2024-06-23
 ### Changed
@@ -215,4 +219,6 @@ runtime 2.2.
 [2.4.2]: https://github.com/codingteam/emulsion/compare/v2.4.1...v2.4.2
 [2.4.3]: https://github.com/codingteam/emulsion/compare/v2.4.2...v2.4.3
 [2.4.4]: https://github.com/codingteam/emulsion/compare/v2.4.3...v2.4.4
-[Unreleased]: https://github.com/codingteam/emulsion/compare/v2.4.4...HEAD
+[3.0.0]: https://github.com/codingteam/emulsion/compare/v2.4.4...v3.0.0
+[4.0.0]: https://github.com/codingteam/emulsion/compare/v3.0.0...v4.0.0
+[Unreleased]: https://github.com/codingteam/emulsion/compare/v4.0.0...HEAD
diff --git a/Emulsion/Emulsion.fsproj b/Emulsion/Emulsion.fsproj
index 3d0423c..6de0057 100644
--- a/Emulsion/Emulsion.fsproj
+++ b/Emulsion/Emulsion.fsproj
@@ -8,7 +8,7 @@ SPDX-License-Identifier: MIT
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net9.0</TargetFramework>
-    <Version>3.0.0</Version>
+    <Version>4.0.0</Version>
     <RollForward>Major</RollForward>
   </PropertyGroup>
   <ItemGroup>
diff --git a/LICENSE.md b/LICENSE.md
index 8c2c31e..9be6c02 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,6 +1,6 @@
 The MIT License
 ===============
-Copyright (C) 2024 emulsion contributors
+Copyright (C) 2025 Emulsion contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in