diff --git a/CHANGELOG.md b/CHANGELOG.md
index bbdf648..aa4a351 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ 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).
 
-## [UNRELEASED]
+## [0.4.0] - 2024-03-19
 
 ### Added
 
@@ -27,6 +27,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Old CLI files moved to cmd/v0
+- Deprecated existing CLI
+- package organization
+- rules execution order is more structured
 
 ## [0.3.0] - 2023-10-17
 
diff --git a/README.md b/README.md
index aa22b12..e5e3cb1 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ The CLI is currently going through a much needed refactor.
 Once all existing features have been implemented in the new CLI, the old one will be deprecated and then removed in
 a few versions.
 
-To enable the legacy CLI, set the variable `GATECHECK_FF_CLI_V1_ENABLED=1`.
+To enable the legacy CLI, set the variable `GATECHECK_FF_LEGACY_CLI_ENABLED=1`.
 
 ## Getting Started