From ed5e7cf116a3786bb6c237eaf06159137f4d0ba3 Mon Sep 17 00:00:00 2001
From: Kevin Lewi <lewi.kevin.k@gmail.com>
Date: Thu, 23 Oct 2025 16:28:30 -0700
Subject: [PATCH] Publishing v4.0.0 (#407)

---
 CHANGELOG.md       | 2 +-
 Cargo.toml         | 2 +-
 README.md          | 2 +-
 tests/migration.rs | 8 ++++++++
 4 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5faf1a8..320ce86 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## 4.0.0-pre.0 (September 8, 2025)
+## 4.0.0 (October 23, 2025)
 * Increased MSRV to 1.83
 * Synced implementation with RFC 9807 (no core protocol changes)
 * Added a SIGMA-I key exchange implementation
diff --git a/Cargo.toml b/Cargo.toml
index ee1a991..ec27bcc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,7 @@ name = "opaque-ke"
 readme = "README.md"
 repository = "https://github.com/facebook/opaque-ke"
 rust-version = "1.85"
-version = "4.0.0-pre.0"
+version = "4.0.0"
 
 [features]
 argon2 = ["dep:argon2"]
diff --git a/README.md b/README.md
index 861fda1..3253131 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Installation
 Add the following line to the dependencies of your `Cargo.toml`:
 
 ```
-opaque-ke = "4.0.0-pre.0"
+opaque-ke = "4"
 ```
 
 ### Minimum Supported Rust Version
diff --git a/tests/migration.rs b/tests/migration.rs
index 58dfc21..7cfeb43 100644
--- a/tests/migration.rs
+++ b/tests/migration.rs
@@ -1,3 +1,11 @@
+// Copyright (c) Meta Platforms, Inc. and affiliates.
+//
+// This source code is dual-licensed under either the MIT license found in the
+// LICENSE-MIT file in the root directory of this source tree or the Apache
+// License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+// of this source tree. You may select, at your option, one of the above-listed
+// licenses.
+
 use digest::OutputSizeUser;
 use generic_array::GenericArray;
 use generic_array::sequence::{Concat, Split};