diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8eaa1141..f08ca951 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [6.0.0]
+### Changed
+- **BREAKING**: Fix `normalize` for empty strings and `0` ([#315](https://github.com/MetaMask/eth-sig-util/pull/315))
+  - This is breaking as it changes the behavior of the function with an empty string or `0` as input: it will now return `0x` for an empty string and `0x00` for `0`, instead of `undefined`
+
 ## [5.1.0]
 ### Changed
 - rawEncode: fix broken BigNumber negativity check ([#307](https://github.com/MetaMask/eth-sig-util/pull/307))
@@ -114,7 +119,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix package metadata ([#81](https://github.com/MetaMask/eth-sig-util/pull/81)
 - Switch from Node.js v8 to Node.js v10 ([#76](https://github.com/MetaMask/eth-sig-util/pull/77) and [#80](https://github.com/MetaMask/eth-sig-util/pull/80))
 
-[Unreleased]: https://github.com/MetaMask/eth-sig-util/compare/v5.1.0...HEAD
+[Unreleased]: https://github.com/MetaMask/eth-sig-util/compare/v6.0.0...HEAD
+[6.0.0]: https://github.com/MetaMask/eth-sig-util/compare/v5.1.0...v6.0.0
 [5.1.0]: https://github.com/MetaMask/eth-sig-util/compare/v5.0.3...v5.1.0
 [5.0.3]: https://github.com/MetaMask/eth-sig-util/compare/v5.0.2...v5.0.3
 [5.0.2]: https://github.com/MetaMask/eth-sig-util/compare/v5.0.1...v5.0.2
diff --git a/package.json b/package.json
index 8e0be67b..0a4e604e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@metamask/eth-sig-util",
-  "version": "5.1.0",
+  "version": "6.0.0",
   "description": "A few useful functions for signing ethereum data",
   "keywords": [
     "ethereum",