diff --git a/Cargo.toml b/Cargo.toml
index 154fe08..e0adc57 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ members = ["chorus_lib", "chorus_derive"]
 resolver = "2"
 
 [workspace.package]
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 authors = ["Shun Kashiwa <shunthedev@gmail.com>"]
 homepage = "https://lsd-ucsc.github.io/ChoRus/"