diff --git a/CHANGELOG.md b/CHANGELOG.md
index d2ab5c3..d68d4cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ 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]
+
+## [4.0.0]
 ### Changed
 - **BREAKING**: Update `phishingSafelistStream` to send `origin` instead of `hostname` as a parameter for `safelistPhishingDomain` method ([#165](https://github.com/MetaMask/phishing-warning/pull/165))
 
@@ -95,7 +97,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Initial implementation of the phishing warning page
   - This should behave identically to the phishing warning page built into the MetaMask extension.
 
-[Unreleased]: https://github.com/MetaMask/phishing-warning/compare/v3.0.4...HEAD
+[Unreleased]: https://github.com/MetaMask/phishing-warning/compare/v4.0.0...HEAD
+[4.0.0]: https://github.com/MetaMask/phishing-warning/compare/v3.0.4...v4.0.0
 [3.0.4]: https://github.com/MetaMask/phishing-warning/compare/v3.0.3...v3.0.4
 [3.0.3]: https://github.com/MetaMask/phishing-warning/compare/v3.0.2...v3.0.3
 [3.0.2]: https://github.com/MetaMask/phishing-warning/compare/v3.0.1...v3.0.2
diff --git a/package.json b/package.json
index c05fa94..14403b1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@metamask/phishing-warning",
-  "version": "3.0.4",
+  "version": "4.0.0",
   "description": "A page to warn users about a suspected phishing site.",
   "repository": {
     "type": "git",