diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07c9d2f..a27552e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,15 +3,18 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+## [2.2.0] - 2021-08-24
+
 ### Added
-- Add appendix generation utility
-- Support unicode extension
+- Add appendix generation utility(#3)
+- Support unicode extension(#4,#5)
+- Provide Graalvm-native-image command(#7)
 
 ### Changed
 - Spin out tools to its individual project
 - Change license to GPL-3
-- Use picocli for CLI options
-- Support subcommand
+- Use picocli for CLI options(#1)
+- Support subcommand(#2,#6)
 
 ## [2.1.0] - 2021-03-10
 
@@ -42,29 +45,9 @@ All notable changes to this project will be documented in this file.
 - Target java version to 8.
 - Add github actions workflows
 
-## [1.99.1.dev] - 2016-10-15
-### Added
-- Add unit tests.
-
-### Changed
-- Introduce EBFormat enum class.
-  Now deprecated EBFile.FORMAT_* integer constants. Please use EBFormat enum instead of constants.
-- [#3] Build with Gradle build system.
-- [#4] Change package location to io.github.eb4j from original fuku.eb4j.
-- [#30] Refactoring to reduce method size smaller.
--- Introduce BookReader.BookReaderHandler class.
-- [#30] Become final to all method arguments and remove adverse effect.
-- Translate javadoc comments in English.
-
-### Fixed
-- [#14] Fix findbugs DM_DEFAULT_ENCODING warnings.
-- [#2] Fix failure to read Gakken Gendai Shin-Kokugo Jiten + Kanjigen(@amake).
-
 ## 1.99.0.dev - 2016-06-01
 ### Added
 - Import from eb4j-1.0.5
 
-[Unreleased]: https://github.com/eb4j/eb4j/compare/v2.1.0...HEAD
-[2.1.0]: https://github.com/eb4j/eb4j/compare/v2.0.0...v2.1.0
-[2.0.0]: https://github.com/eb4j/eb4j/compare/v1.99.1...v2.0.0
-[1.99.1.dev]: https://github.com/eb4j/eb4j/compare/v1.99.0...v1.99.1
+[Unreleased]: https://github.com/eb4j/eb4j/compare/v2.2.0...HEAD
+[2.2.0]: https://github.com/eb4j/eb4j/compare/v2.1.0...v2.2.0