diff --git a/Cargo.toml b/Cargo.toml
index 740add8..1761f36 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ members = ["cdevents-sdk", "generator"]
 
 [workspace.package]
 edition = "2024"
-version = "0.3.0"
+version = "0.4.0"
 license = "Apache-2.0"
 repository = "https://github.com/cdevents/sdk-rust"
 rust-version = "1.85"
diff --git a/cdevents-sdk/CHANGELOG.md b/cdevents-sdk/CHANGELOG.md
index dcb2b98..47120ce 100644
--- a/cdevents-sdk/CHANGELOG.md
+++ b/cdevents-sdk/CHANGELOG.md
@@ -6,6 +6,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0](https://github.com/cdevents/sdk-rust/compare/cdevents-sdk-v0.3.0...cdevents-sdk-v0.4.0) - 2026-06-10
+
+### Fixed
+
+- *(deps)* support CDEvents 0.5.1 explicitly ([#68](https://github.com/cdevents/sdk-rust/pull/68))
+
 ## [0.3.0](https://github.com/cdevents/sdk-rust/compare/cdevents-sdk-v0.2.1...cdevents-sdk-v0.3.0) - 2026-02-16
 
 ### Added