diff --git a/CHANGELOG.md b/CHANGELOG.md
index ef544e1..fd54447 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.4.2 (2025-09-21)
+### Added
+- `Array::slice_as_flattened(_mut)` ([#142])
+
+[#142]: https://github.com/RustCrypto/hybrid-array/pull/142
+
 ## 0.4.1 (2025-09-10)
 ### Changed
 - Make slice conversions `const fn` ([#140])
diff --git a/Cargo.lock b/Cargo.lock
index 9adbdf3..16acac5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -30,7 +30,7 @@ checksum = "b6b1fc10dbac614ebc03540c9dbd60e83887fda27794998c6528f1782047d540"
 
 [[package]]
 name = "hybrid-array"
-version = "0.4.1"
+version = "0.4.2"
 dependencies = [
  "bincode",
  "bytemuck",
diff --git a/Cargo.toml b/Cargo.toml
index c483716..b42cfef 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "hybrid-array"
-version = "0.4.1"
+version = "0.4.2"
 description = """
 Hybrid typenum-based and const generic array types designed to provide the
 flexibility of typenum-based expressions while also allowing interoperability