diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4b63e9da..d73837bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,8 @@
 <!-- next-header -->
 ## [Unreleased] (ReleaseDate)
 
+## [v0.4.0] (2024-03-27)
+
 ### Breaking changes
 
 * `#[savvy]` on a struct's `impl` now generates the same name of R object that
@@ -257,7 +259,8 @@ fn get_name_external(x: &Person) -> savvy::Result<savvy::Sexp> {
 * `#[savvy]` now accepts `savvy::Sexp` as input.
 
 <!-- next-url -->
-[Unreleased]: https://github.com/yutannihilation/savvy/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/yutannihilation/savvy/compare/v0.4.0...HEAD
+[v0.4.0]: https://github.com/yutannihilation/savvy/compare/v0.3.0...v0.4.0
 [v0.3.0]: https://github.com/yutannihilation/savvy/compare/v0.2.20...v0.3.0
 [v0.2.20]: https://github.com/yutannihilation/savvy/compare/v0.2.19...v0.2.20
 [v0.2.19]: https://github.com/yutannihilation/savvy/compare/v0.2.18...v0.2.19
diff --git a/Cargo.toml b/Cargo.toml
index bba5fdf2..971b44b0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,8 +13,8 @@ exclude = ["/book", "/R-package", "README.qmd"]
 rust-version = "1.64.0"
 
 [dependencies]
-savvy-ffi = { version = "0.3.0", path = "./savvy-ffi" }
-savvy-macro = { version = "0.3.0", path = "./savvy-macro" }
+savvy-ffi = { version = "0.4.0", path = "./savvy-ffi" }
+savvy-macro = { version = "0.4.0", path = "./savvy-macro" }
 once_cell = "1"
 num-complex = { version = "0.4.5", optional = true }
 
@@ -51,7 +51,7 @@ members = ["savvy-macro", "savvy-bindgen", "savvy-cli", "savvy-ffi", "xtask"]
 resolver = "2"
 
 [workspace.package]
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 authors = ["Hiroaki Yutani"]
 license = "MIT"
diff --git a/savvy-macro/Cargo.toml b/savvy-macro/Cargo.toml
index c758ffef..cdd6aaa4 100644
--- a/savvy-macro/Cargo.toml
+++ b/savvy-macro/Cargo.toml
@@ -17,7 +17,7 @@ proc-macro2 = "1"
 quote = "1"
 syn = { version = "2", features = ["full", "extra-traits"] }
 
-savvy-bindgen = { version = "0.3.0", path = "../savvy-bindgen" }
+savvy-bindgen = { version = "0.4.0", path = "../savvy-bindgen" }
 
 [dev-dependencies]
 trybuild = "1"