diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd8bc8e..8df25cf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [15.1.0]
+### Changed
+- Improved validation of primary type for signTypedDataV3 and signTypedDataV4 ([#350](https://github.com/MetaMask/eth-json-rpc-middleware/pull/350))
+
 ## [15.0.1]
 ### Changed
 - Bump `@metamask/eth-block-tracker` from `^11.0.1` to `^11.0.3` ([#347](https://github.com/MetaMask/eth-json-rpc-middleware/pull/347))
@@ -225,7 +229,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `json-rpc-engine@5.3.0` ([#53](https://github.com/MetaMask/eth-json-rpc-middleware/pull/53))
 - `eth-rpc-errors@3.0.0` ([#55](https://github.com/MetaMask/eth-json-rpc-middleware/pull/55))
 
-[Unreleased]: https://github.com/MetaMask/eth-json-rpc-middleware/compare/v15.0.1...HEAD
+[Unreleased]: https://github.com/MetaMask/eth-json-rpc-middleware/compare/v15.1.0...HEAD
+[15.1.0]: https://github.com/MetaMask/eth-json-rpc-middleware/compare/v15.0.1...v15.1.0
 [15.0.1]: https://github.com/MetaMask/eth-json-rpc-middleware/compare/v15.0.0...v15.0.1
 [15.0.0]: https://github.com/MetaMask/eth-json-rpc-middleware/compare/v14.0.2...v15.0.0
 [14.0.2]: https://github.com/MetaMask/eth-json-rpc-middleware/compare/v14.0.1...v14.0.2
diff --git a/package.json b/package.json
index c6fb4f5..1370349 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@metamask/eth-json-rpc-middleware",
-  "version": "15.0.1",
+  "version": "15.1.0",
   "description": "Ethereum-related json-rpc-engine middleware.",
   "repository": {
     "type": "git",