diff --git a/Cargo.toml b/Cargo.toml
index b7694e8..fa34b65 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pycrdt"
-version = "0.3.6"
+version = "0.4.0"
 edition = "2021"
 
 [lib]