diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d3b984..f5a66ba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## [Unreleased]
+## [0.4.0] - 2025-02-27
 
 ### Added
 - `sync` subcommand, which performs git pull (fast-forward) and push (#21)
@@ -49,7 +49,7 @@
 - `backup done` subcommand
 - `completion` subcommand
 
-[Unreleased]: https://github.com/qwjyh/xdbm/compare/v0.3.0...HEAD
+[0.4.0]: https://github.com/qwjyh/xdbm/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/qwjyh/xdbm/compare/v0.2.1...v0.3.0
 [0.2.1]: https://github.com/qwjyh/xdbm/compare/v0.2.0...v0.2.1
 [0.2.0]: https://github.com/qwjyh/xdbm/releases/tag/v0.2.0
diff --git a/Cargo.toml b/Cargo.toml
index 45c625b..44a8139 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "xdbm"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["qwjyh <urataw421@gmail.com>"]
 edition = "2021"
 description = "Cross device backup manager, which manages backups on several storages mounted on multiple devices."