diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9fc4c99f1..a416cf190 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,3 +10,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 > Fork releases use `v`-prefixed tags (`v4.0.0`); upstream uses bare tags (`3.1.2`).
 
 ## [Unreleased]
+
+## [5.0.0](https://github.com/structured-world/coordinode-lsm-tree/compare/v4.0.0...v5.0.0) - 2026-03-23
+
+### Added
+
+- *(compression)* zstd dictionary compression support ([#131](https://github.com/structured-world/coordinode-lsm-tree/pull/131))
+
+### Fixed
+
+- thread UserComparator through ingestion guards and range overlap ([#139](https://github.com/structured-world/coordinode-lsm-tree/pull/139))
+
+### Refactored
+
+- add #[non_exhaustive] to CompressionType enum
diff --git a/Cargo.toml b/Cargo.toml
index d6b865135..edec113a4 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 = "MIT OR Apache-2.0"
-version = "4.0.0"
+version = "5.0.0"
 edition = "2021"
 rust-version = "1.90"
 readme = "README.md"