diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..65b8b37
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,16 @@
+# 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]
+### Added
+- Allow relationship links to be delcared as a method ([#2](https://github.com/fast-jsonapi/fast_jsonapi/pull/2))
+- Test against Ruby 2.6 ([#1](https://github.com/fast-jsonapi/fast_jsonapi/pull/1))
+### Changed
+- Optimize SerializationCore.get_included_records calculates remaining_items only once ([#4](https://github.com/fast-jsonapi/fast_jsonapi/pull/4))
+- Optimize SerializtionCore.parse_include_item by mapping in place ([#5](https://github.com/fast-jsonapi/fast_jsonapi/pull/5))
+- Define ObjectSerializer.set_key_transform mapping as a constant ([#7](https://github.com/fast-jsonapi/fast_jsonapi/pull/7))
+
+[Unreleased]: https://github.com/fast-jsonapi/fast_jsonapi/compare/dev...HEAD