diff --git a/CHANGELOG.md b/CHANGELOG.md
index d266946..25d11a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Release notes
 
+## 0.5.0 (2024-07-09)
+
+### Features
+
+- Handle legacy tk1 optype  ([#54](https://github.com/CQCL/tket-json-rs/pull/54))
+- [**breaking**] Classical op params ([#56](https://github.com/CQCL/tket-json-rs/pull/56))
+
+
 ## 0.4.2 (2024-07-05)
 
 ### Bug Fixes
diff --git a/Cargo.toml b/Cargo.toml
index cb9c0cb..d570d7e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tket-json-rs"
-version = "0.4.2"
+version = "0.5.0"
 license = "Apache-2.0"
 edition = "2021"
 rust-version = "1.70"