diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd6a459b6..822c30f52 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.51.0](https://github.com/rust-bio/rust-htslib/compare/v0.50.0...v0.51.0) (2025-10-15)
+
+
+### Features
+
+* Add support for updating existing aux tags inplace. ([#481](https://github.com/rust-bio/rust-htslib/issues/481)) ([f4a1106](https://github.com/rust-bio/rust-htslib/commit/f4a1106df49bde257b323d966fe4228b1a5ece15))
+
 ## [0.50.0](https://github.com/rust-bio/rust-htslib/compare/v0.49.0...v0.50.0) (2025-07-09)
 
 
diff --git a/Cargo.toml b/Cargo.toml
index ee100f2aa..288148129 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ license = "MIT"
 name = "rust-htslib"
 readme = "README.md"
 repository = "https://github.com/rust-bio/rust-htslib.git"
-version = "0.50.0"
+version = "0.51.0"
 
 [package.metadata.release]
 pre-release-commit-message = "release version {{version}}"