diff --git a/package.json b/package.json
index 1d33a16c61..a95d5d2da9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@metamask/core-monorepo",
-  "version": "242.0.0",
+  "version": "243.0.0",
   "private": true,
   "description": "Monorepo for packages shared between MetaMask clients",
   "repository": {
diff --git a/packages/signature-controller/CHANGELOG.md b/packages/signature-controller/CHANGELOG.md
index cfac8b24f9..5040498b49 100644
--- a/packages/signature-controller/CHANGELOG.md
+++ b/packages/signature-controller/CHANGELOG.md
@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [21.1.0]
+
+### Added
+
+- Add `isDecodeSignatureRequestEnabled` constructor callback to determine if decoding API should be used ([#4903](https://github.com/MetaMask/core/pull/4903))
+- Add `decodingApiUrl` constructor property to specify URL of API to provide additional decoding data. ([#4855](https://github.com/MetaMask/core/pull/4855))
+
 ## [21.0.0]
 
 ### Added
@@ -400,7 +407,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial release ([#1214](https://github.com/MetaMask/core/pull/1214))
 
-[Unreleased]: https://github.com/MetaMask/core/compare/@metamask/signature-controller@21.0.0...HEAD
+[Unreleased]: https://github.com/MetaMask/core/compare/@metamask/signature-controller@21.1.0...HEAD
+[21.1.0]: https://github.com/MetaMask/core/compare/@metamask/signature-controller@21.0.0...@metamask/signature-controller@21.1.0
 [21.0.0]: https://github.com/MetaMask/core/compare/@metamask/signature-controller@20.1.0...@metamask/signature-controller@21.0.0
 [20.1.0]: https://github.com/MetaMask/core/compare/@metamask/signature-controller@20.0.0...@metamask/signature-controller@20.1.0
 [20.0.0]: https://github.com/MetaMask/core/compare/@metamask/signature-controller@19.1.0...@metamask/signature-controller@20.0.0
diff --git a/packages/signature-controller/package.json b/packages/signature-controller/package.json
index bfa14109ba..df987909fc 100644
--- a/packages/signature-controller/package.json
+++ b/packages/signature-controller/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@metamask/signature-controller",
-  "version": "21.0.0",
+  "version": "21.1.0",
   "description": "Processes signing requests in order to sign arbitrary and typed data",
   "keywords": [
     "MetaMask",