diff --git a/Cargo.toml b/Cargo.toml
index 59da3c4..e8c6d27 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,6 @@ members = ["crates/*"]
 resolver = "2"
 
 [workspace.package]
-version = "0.0.8"
+version = "0.0.9"
 edition = "2021"
 license = "Apache-2.0"
diff --git a/crates/wavekat-core/CHANGELOG.md b/crates/wavekat-core/CHANGELOG.md
index 568248a..a11302f 100644
--- a/crates/wavekat-core/CHANGELOG.md
+++ b/crates/wavekat-core/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.0.9](https://github.com/wavekat/wavekat-core/compare/v0.0.8...v0.0.9) - 2026-05-14
+
+### Added
+
+- add AudioSource/AudioSink traits + G.711 codec ([#21](https://github.com/wavekat/wavekat-core/pull/21))
+
 ## [0.0.8](https://github.com/wavekat/wavekat-core/compare/v0.0.7...v0.0.8) - 2026-04-17
 
 ### Added