diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35ffee312..583fc16b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [4.3.1](https://github.com/structured-world/coordinode-lsm-tree/compare/v4.3.0...v4.3.1) - 2026-04-06
+
+### Performance
+
+- *(compression)* use numeric zstd levels in pure Rust backend ([#226](https://github.com/structured-world/coordinode-lsm-tree/pull/226))
+- batch multi_get + PinnableSlice + WriteBatch ([#214](https://github.com/structured-world/coordinode-lsm-tree/pull/214))
+
 ## [4.3.0](https://github.com/structured-world/coordinode-lsm-tree/compare/v4.2.0...v4.3.0) - 2026-04-05
 
 ### Added
diff --git a/Cargo.toml b/Cargo.toml
index 0dea1b8a4..7369a9c3c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "coordinode-lsm-tree"
 description = "A K.I.S.S. implementation of log-structured merge trees (LSM-trees/LSMTs) — CoordiNode fork"
 license = "Apache-2.0"
-version = "4.3.0"
+version = "4.3.1"
 edition = "2024"
 rust-version = "1.92"
 readme = "README.md"