diff --git a/Cargo.toml b/Cargo.toml
index dcd0c56..9fa2a41 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "kbo"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 rust-version = "1.77.0"
 authors = ["Tommi Mäklin <tommi@maklin.fi>"]