diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3454a6c..674f853 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2024-08-07
+
+### Added
+- add correction
+- add small docs
+
 ## [0.3.0] - 2024-08-07
 
 ### Added
diff --git a/Cargo.toml b/Cargo.toml
index 233b354..fa782fb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ members = ["crates/*"]
 resolver = "2"
 
 [workspace.package]
-version = "0.3.0"
+version = "0.4.0"
 
 [workspace.dependencies]
 mad = { path = "crates/mad" }