diff --git a/Cargo.lock b/Cargo.lock
index 6870a26c..2b22a999 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -69,15 +69,15 @@ version = "0.1.1"
 [[package]]
 name = "cpufeatures"
 version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b2a41393f66f16b0823bb79094d54ac5fbd34ab292ddafb9a0456ac9f87d201"
 dependencies = [
  "libc",
 ]
 
 [[package]]
 name = "cpufeatures"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b2a41393f66f16b0823bb79094d54ac5fbd34ab292ddafb9a0456ac9f87d201"
+version = "0.3.1"
 dependencies = [
  "libc",
 ]
@@ -189,7 +189,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ffd9697dc4a9a62e2da93389f34400b77a28f0287711263cabb203b3ccb9c0e4"
 dependencies = [
  "cfg-if",
- "cpufeatures 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cpufeatures 0.3.0",
 ]
 
 [[package]]
diff --git a/cpufeatures/CHANGELOG.md b/cpufeatures/CHANGELOG.md
index 90aa8153..dd7b5dbd 100644
--- a/cpufeatures/CHANGELOG.md
+++ b/cpufeatures/CHANGELOG.md
@@ -5,17 +5,17 @@ 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).
 
-## 0.3.1 (UNRELEASED)
+## 0.3.1 (2026-08-24)
+### Changed
+- Use compile-time target feature detection under Miri ([#1513])
+
 ### Fixed
 - Detection of the `avx` target feature ([#1511])
 - Use `::MAX` constant instead of deprecated `::max_value()` associated method ([#1515])
 
-### Changed
-- Use compile-time target feature detection under Miri ([#1513])
-
 [#1511]: https://github.com/RustCrypto/utils/pull/1511
-[#1515]: https://github.com/RustCrypto/utils/pull/1515
 [#1513]: https://github.com/RustCrypto/utils/pull/1513
+[#1515]: https://github.com/RustCrypto/utils/pull/1515
 
 ## 0.3.0 (2026-02-05)
 ### Added
diff --git a/cpufeatures/Cargo.toml b/cpufeatures/Cargo.toml
index 7cb8c8e2..d9834499 100644
--- a/cpufeatures/Cargo.toml
+++ b/cpufeatures/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cpufeatures"
-version = "0.3.0"
+version = "0.3.1"
 authors = ["RustCrypto Developers"]
 edition = "2024"
 rust-version = "1.85"
diff --git a/cpufeatures/LICENSE-MIT b/cpufeatures/LICENSE-MIT
index 0cd648f7..b135e18d 100644
--- a/cpufeatures/LICENSE-MIT
+++ b/cpufeatures/LICENSE-MIT
@@ -1,4 +1,4 @@
-Copyright (c) 2020-2025 The RustCrypto Project Developers
+Copyright (c) 2020-2026 The RustCrypto Project Developers
 
 Permission is hereby granted, free of charge, to any
 person obtaining a copy of this software and associated