diff --git a/NOTICE.txt b/NOTICE.txt
index bc246d5..7365e34 100644
--- a/NOTICE.txt
+++ b/NOTICE.txt
@@ -1,5 +1,5 @@
 fmcsadmin
-Copyright 2017-2023 Emic Corporation, https://www.emic.co.jp/
+Copyright 2017-2024 Emic Corporation, https://www.emic.co.jp/
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/fmcsadmin.go b/fmcsadmin.go
index 292a5f0..a6a264e 100644
--- a/fmcsadmin.go
+++ b/fmcsadmin.go
@@ -1,6 +1,6 @@
 /*
 fmcsadmin
-Copyright 2017-2023 Emic Corporation, https://www.emic.co.jp/
+Copyright 2017-2024 Emic Corporation, https://www.emic.co.jp/
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/release-notes.txt b/release-notes.txt
index 7b8211b..967e29c 100644
--- a/release-notes.txt
+++ b/release-notes.txt
@@ -1,5 +1,5 @@
 fmcsadmin
-(c) 2017-2023 Emic Corporation <https://www.emic.co.jp/>
+(c) 2017-2024 Emic Corporation <https://www.emic.co.jp/>
 This software is distributed under the Apache License, Version 2.0, see LICENSE.txt and NOTICE.txt for more information.
 
 Version: 2.2.0 (in development)