diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 34a7d85..d4ee506 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -1,5 +1,5 @@
 #
-# Copyright 2022-2023 The sacloud/object-storage-api-go authors
+# Copyright 2022-2025 The sacloud/object-storage-api-go authors
 #
 # 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/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 6431cfc..b1dc253 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -1,5 +1,5 @@
 #
-# Copyright 2022-2023 The sacloud/object-storage-api-go authors
+# Copyright 2022-2025 The sacloud/object-storage-api-go authors
 #
 # 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/.spectral.yaml b/.spectral.yaml
index f74a5d3..3890ac4 100644
--- a/.spectral.yaml
+++ b/.spectral.yaml
@@ -4,3 +4,4 @@ rules:
   operation-tag-defined: false
   path-keys-no-trailing-slash: false
   oas3-server-trailing-slash: false
+  oas3-server-variables: false
\ No newline at end of file
diff --git a/Makefile b/Makefile
index 984e312..8eb48f6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright 2022-2023 The sacloud/object-storage-api-go Authors
+# Copyright 2022-2025 The sacloud/object-storage-api-go Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
 
 #====================
 AUTHOR         ?= The sacloud/object-storage-api-go authors
-COPYRIGHT_YEAR ?= 2022-2023
+COPYRIGHT_YEAR ?= 2022-2025
 
 BIN            ?= dist/sacloud-ojs-fake-server
 GO_ENTRY_FILE  ?= cmd/sacloud-ojs-fake-server/*.go
diff --git a/README.md b/README.md
index f80dc54..08a82b5 100644
--- a/README.md
+++ b/README.md
@@ -65,6 +65,6 @@ func main() {
 
 ## License
 
-`sacloud/object-storage-api-go` Copyright (C) 2022-2023 [The sacloud/object-storage-api-go Authors](AUTHORS).
+`sacloud/object-storage-api-go` Copyright (C) 2022-2025 [The sacloud/object-storage-api-go Authors](AUTHORS).
 
 This project is published under [Apache 2.0 License](LICENSE).
diff --git a/acceptance_test.go b/acceptance_test.go
index caf713f..4292e4d 100644
--- a/acceptance_test.go
+++ b/acceptance_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/accounts.go b/accounts.go
index 6264319..f4360c3 100644
--- a/accounts.go
+++ b/accounts.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/aliases.go b/apis/v1/aliases.go
index 01548f5..ed98ea5 100644
--- a/apis/v1/aliases.go
+++ b/apis/v1/aliases.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/errors.go b/apis/v1/errors.go
index b8e16a7..76a79ff 100644
--- a/apis/v1/errors.go
+++ b/apis/v1/errors.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/example_fake_test.go b/apis/v1/example_fake_test.go
index 5e34e32..74f3410 100644
--- a/apis/v1/example_fake_test.go
+++ b/apis/v1/example_fake_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/example_test.go b/apis/v1/example_test.go
index 7d5fcdc..b404d83 100644
--- a/apis/v1/example_test.go
+++ b/apis/v1/example_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/functions.go b/apis/v1/functions.go
index d42c080..e1fe33a 100644
--- a/apis/v1/functions.go
+++ b/apis/v1/functions.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/interceptors.go b/apis/v1/interceptors.go
index 8e80c46..105552a 100644
--- a/apis/v1/interceptors.go
+++ b/apis/v1/interceptors.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/marshaler.go b/apis/v1/marshaler.go
index 9892171..7bdcfe4 100644
--- a/apis/v1/marshaler.go
+++ b/apis/v1/marshaler.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/primitives.go b/apis/v1/primitives.go
index 700acd4..d486317 100644
--- a/apis/v1/primitives.go
+++ b/apis/v1/primitives.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/zz_client_gen.go b/apis/v1/zz_client_gen.go
index a2ea80b..30dcf4b 100644
--- a/apis/v1/zz_client_gen.go
+++ b/apis/v1/zz_client_gen.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/zz_server_gen.go b/apis/v1/zz_server_gen.go
index 1105c94..c315af8 100644
--- a/apis/v1/zz_server_gen.go
+++ b/apis/v1/zz_server_gen.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/apis/v1/zz_types_gen.go b/apis/v1/zz_types_gen.go
index fc43abb..e214d78 100644
--- a/apis/v1/zz_types_gen.go
+++ b/apis/v1/zz_types_gen.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/buckets.go b/buckets.go
index 1b2d174..0e04996 100644
--- a/buckets.go
+++ b/buckets.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/client.go b/client.go
index fd29fb9..c0619d1 100644
--- a/client.go
+++ b/client.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/cmd/sacloud-ojs-fake-server/main.go b/cmd/sacloud-ojs-fake-server/main.go
index 954944b..901e1d7 100644
--- a/cmd/sacloud-ojs-fake-server/main.go
+++ b/cmd/sacloud-ojs-fake-server/main.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/example_fake_test.go b/example_fake_test.go
index 4868bd5..530cfe8 100644
--- a/example_fake_test.go
+++ b/example_fake_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/example_test.go b/example_test.go
index 2510bae..d4fad62 100644
--- a/example_test.go
+++ b/example_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/account_keys.go b/fake/account_keys.go
index 2135843..5f4474a 100644
--- a/fake/account_keys.go
+++ b/fake/account_keys.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/account_keys_test.go b/fake/account_keys_test.go
index c4f47a6..4fddda8 100644
--- a/fake/account_keys_test.go
+++ b/fake/account_keys_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/accounts.go b/fake/accounts.go
index dd1ce52..92b511b 100644
--- a/fake/accounts.go
+++ b/fake/accounts.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/accounts_test.go b/fake/accounts_test.go
index adbbb68..838c2f1 100644
--- a/fake/accounts_test.go
+++ b/fake/accounts_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/buckets.go b/fake/buckets.go
index ef2c305..5555c78 100644
--- a/fake/buckets.go
+++ b/fake/buckets.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/buckets_test.go b/fake/buckets_test.go
index 50d4f29..cc354ad 100644
--- a/fake/buckets_test.go
+++ b/fake/buckets_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/clusters.go b/fake/clusters.go
index a23471d..ec2d822 100644
--- a/fake/clusters.go
+++ b/fake/clusters.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/clusters_test.go b/fake/clusters_test.go
index 1c66965..04953d6 100644
--- a/fake/clusters_test.go
+++ b/fake/clusters_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/engine.go b/fake/engine.go
index 70617a0..e91dce6 100644
--- a/fake/engine.go
+++ b/fake/engine.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/errors.go b/fake/errors.go
index f0712af..f61b624 100644
--- a/fake/errors.go
+++ b/fake/errors.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/permission_keys.go b/fake/permission_keys.go
index 7a8b6e5..7acdb18 100644
--- a/fake/permission_keys.go
+++ b/fake/permission_keys.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/permissions.go b/fake/permissions.go
index c6d0dfa..e733e8a 100644
--- a/fake/permissions.go
+++ b/fake/permissions.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/permissions_test.go b/fake/permissions_test.go
index 4e320ac..ecc1775 100644
--- a/fake/permissions_test.go
+++ b/fake/permissions_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/server/account_keys.go b/fake/server/account_keys.go
index f5c2d90..ae107e2 100644
--- a/fake/server/account_keys.go
+++ b/fake/server/account_keys.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/server/accounts.go b/fake/server/accounts.go
index 1e62654..f5dad56 100644
--- a/fake/server/accounts.go
+++ b/fake/server/accounts.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/server/buckets.go b/fake/server/buckets.go
index 8566558..f5a0dce 100644
--- a/fake/server/buckets.go
+++ b/fake/server/buckets.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/server/clusters.go b/fake/server/clusters.go
index 865a9a1..37eaaa7 100644
--- a/fake/server/clusters.go
+++ b/fake/server/clusters.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/server/permission_keys.go b/fake/server/permission_keys.go
index 5f02b94..89b0e43 100644
--- a/fake/server/permission_keys.go
+++ b/fake/server/permission_keys.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/server/permissions.go b/fake/server/permissions.go
index e8fdf07..d3b48ee 100644
--- a/fake/server/permissions.go
+++ b/fake/server/permissions.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/server/server.go b/fake/server/server.go
index 189e1b3..e2eb193 100644
--- a/fake/server/server.go
+++ b/fake/server/server.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/server/server_test.go b/fake/server/server_test.go
index db83725..f165575 100644
--- a/fake/server/server_test.go
+++ b/fake/server/server_test.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/server/site_status.go b/fake/server/site_status.go
index 6953a60..2afb37e 100644
--- a/fake/server/site_status.go
+++ b/fake/server/site_status.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/fake/site_status.go b/fake/site_status.go
index 48da572..f939993 100644
--- a/fake/site_status.go
+++ b/fake/site_status.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/permissions.go b/permissions.go
index 2a1c140..16727f1 100644
--- a/permissions.go
+++ b/permissions.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/site_status.go b/site_status.go
index 467f201..f04c39c 100644
--- a/site_status.go
+++ b/site_status.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/sites.go b/sites.go
index 5c87228..118d7a4 100644
--- a/sites.go
+++ b/sites.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // 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/version.go b/version.go
index 7c0eb17..404e494 100644
--- a/version.go
+++ b/version.go
@@ -1,4 +1,4 @@
-// Copyright 2022-2023 The sacloud/object-storage-api-go authors
+// Copyright 2022-2025 The sacloud/object-storage-api-go authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.