diff --git a/CHANGELOG.md b/CHANGELOG.md
index 33d5b7e..635da41 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html),
 as of version 2.1.1.
 
+## [4.0.1] - 2025-05-26
+### Fixed
+- Fixed packaging bugs introduced when changing the build system.
+
 ## [4.0.0] - 2025-05-26
 ### Added
 - Added additional logging for Windows API calls.
@@ -115,7 +119,8 @@ as of version 2.1.1.
 - Added a changelog.
 
 
-[Unreleased]: https://github.com/newAM/monitorcontrol/compare/4.0.0...HEAD
+[Unreleased]: https://github.com/newAM/monitorcontrol/compare/4.0.1...HEAD
+[4.0.1]: https://github.com/newAM/monitorcontrol/compare/4.0.0...4.0.1
 [4.0.0]: https://github.com/newAM/monitorcontrol/compare/3.1.0...4.0.0
 [3.1.0]: https://github.com/newAM/monitorcontrol/compare/3.0.3...3.1.0
 [3.0.3]: https://github.com/newAM/monitorcontrol/compare/3.0.2...3.0.3
diff --git a/pyproject.toml b/pyproject.toml
index 49d56cf..7ff9e3b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,9 +34,6 @@ monitorcontrol = "monitorcontrol.__main__:main"
 requires = ["setuptools>=61"]
 build-backend = "setuptools.build_meta"
 
-[tool.setuptools]
-packages = ["monitorcontrol"]
-
 [tool.ruff.lint]
 extend-select = [
     # flake8-builtins