CHANGELOG.md in cloudflare-rails-3.0.0 vs CHANGELOG.md in cloudflare-rails-4.0.0

@@ -2,10 +2,15 @@
 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).
 
-## [3.0.0] - unreleased
+## [4.0.0] - 2023-08-06
+- Fix `appraisal` for ruby `3.x`
+- properly scope railtie initializer (https://github.com/modosc/cloudflare-rails/pull/79)
+- Drop support for unsupported `rails` version `6.0.x`
+
+## [3.0.0] - 2023-01-30
 - Drop support for unsupported `rails` version `5.2.x`
 - Fetch and cache IPs lazily instead of upon initialization (https://github.com/modosc/cloudflare-rails/pull/52)
 
 ## [2.4.0] - 2022-02-22
 - Add trailing slashes to reflect Cloudflare API URLs (https://github.com/modosc/cloudflare-rails/pull/53)