diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4659c54..38ea266 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [0.3.0][] - 2024-04-09
+
+- https://github.com/kaicoh/slack-messaging/pull/8 Builder pattern.
+- https://github.com/kaicoh/slack-messaging/pull/8 Remove `Attachment` (since it's a deprecated legacy feature).
+- https://github.com/kaicoh/slack-messaging/pull/8 Support `Rich text` block.
+
 ## [0.2.2][] - 2023-03-02
 
 - https://github.com/kaicoh/slack-messaging/pull/6 Add `mrkdwn` and `plain_text` macros.
@@ -16,6 +22,7 @@
 
 - pre-release
 
+[0.3.0]: https://github.com/kaicoh/slack-messaging/releases/v0.3.0
 [0.2.2]: https://github.com/kaicoh/slack-messaging/releases/v0.2.2
 [0.2.1]: https://github.com/kaicoh/slack-messaging/releases/v0.2.1
 [0.2.0]: https://github.com/kaicoh/slack-messaging/releases/v0.2.0
diff --git a/LICENSE b/LICENSE
index c620722..4275d6c 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2023 Kanji Tanaka
+Copyright (c) 2024 Kanji Tanaka
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal