CHANGELOG.md in sensu-plugins-mackerel-0.0.2 vs CHANGELOG.md in sensu-plugins-mackerel-1.0.0

@@ -1,14 +1,30 @@
-#Change Log
+# Change Log
 This project adheres to [Semantic Versioning](http://semver.org/).
 
 This CHANGELOG follows the format listed at [Keep A Changelog](http://keepachangelog.com/)
 
-## Unreleased][unreleased]
+## [Unreleased]
 
+## [1.0.0] - 2017-06-26
+### Added
+- Support for Ruby 2.3 and 2.4 (@eheydrick)
+
+### Removed
+- Support for Ruby < 2 (@eheydrick)
+
+### Changed
+- Loosen `sensu-plugin` dependency to `~> 1.2` (@mattyjones)
+- Update to Rubocop `0.40` and cleanup (@eheydrick)
+- Update `json` dependency to `< 2.0.0` for Ruby 2.4
+
 ## [0.0.2] - 2015-07-14
 ### Changed
 - updated sensu-plugin gem to 1.2.0
 
-## [0.0.1] - 2015-06-28
+## 0.0.1 - 2015-06-28
 ### Added
 - initial release
+
+[Unreleased]: https://github.com/sensu-plugins/sensu-plugins-mackerel/compare/1.0.0...HEAD
+[1.0.0]: https://github.com/sensu-plugins/sensu-plugins-mackerel/compare/0.0.2...1.0.0
+[0.0.2]: https://github.com/sensu-plugins/sensu-plugins-mackerel/compare/0.0.1...0.0.2