diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..87213bb
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,15 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0] - 2021-08-22
+### Added
+- Initial release
+
+[Unreleased]: https://github.com/mnishiguchi/sgp40/compare/...HEAD
+[0.1.0]: https://github.com/mnishiguchi/sgp40/releases/tag/v0.1.0