diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7bf44ca..2c80ecd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,16 @@ Record of the modification in project development.
 
 ## [Unreleased] - yyyy-mm-dd
 
+### Added
+### Changed
+### Deprecated
+### Removed
+### Fixed
+### Security
+### Known Issue
+
+## [1.0.0] - 2021-07-03
+
 ### Added
 - [Issue 1 : Support non-GUI install for Void Linux.](https://github.com/suikan4github/kaiten-yaki/issues/1)
 
@@ -14,4 +24,5 @@ Record of the modification in project development.
 ### Known Issue
 
 
-[Unreleased]: https://github.com/suikan4github/kaiten-yaki/compare/v0.0.0...develop
+[Unreleased]: https://github.com/suikan4github/kaiten-yaki/compare/v1.0.0...develop
+[1.0.0]: https://github.com/suikan4github/kaiten-yaki/compare/v0.0.0...v1.0.0
diff --git a/README.md b/README.md
index b94af7c..02f196d 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ As depicted above, the LVM volume group has only one physical volume.
 # Tested environment
 These scripts are tested with the following environment. 
 - VMWare Workstation 15.5.7 ( EFI/BIOS )
-- ThinkPad X200 (BIOS)
+- ThinkPad X220 (BIOS)
 - Ubuntu 20.04.2 amd64 desktop
 - Ubuntu Mate 20.04.2 amd64 desktop
 - void-live-x86_64-20210218-mate.iso