diff --git a/LICENSE b/LICENSE
index 2a819b1..499af10 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021 ICHIRO ITS
+Copyright (c) 2021-2023 ICHIRO ITS
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index e20ae98..1b4507d 100644
--- a/README.md
+++ b/README.md
@@ -48,4 +48,6 @@ jobs:
 
 ## License
 
-This project is maintained by [ICHIRO ITS](https://github.com/ichiro-its) and licensed under the [MIT License](./LICENSE).
+This project is licensed under the terms of the [MIT License](./LICENSE).
+
+Copyright © 2021-2023 [ICHIRO ITS](https://github.com/ichiro-its)