diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0beaab857..fe938d84f 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]
 
+## [9.6.1]
+### Fixed
+- [#11309](https://github.com/MetaMask/metamask-extension/pull/11309): Fixed signTypeData parameter validation issue
+
 ## [9.6.0]
 ### Added
 - [#10905](https://github.com/MetaMask/metamask-extension/pull/10905): Implemented basic switchEthereumChain feature
@@ -2297,7 +2301,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Uncategorized
 - Added the ability to restore accounts from seed words.
 
-[Unreleased]: https://github.com/MetaMask/metamask-extension/compare/v9.6.0...HEAD
+[Unreleased]: https://github.com/MetaMask/metamask-extension/compare/v9.6.1...HEAD
+[9.6.1]: https://github.com/MetaMask/metamask-extension/compare/v9.6.0...v9.6.1
 [9.6.0]: https://github.com/MetaMask/metamask-extension/compare/v9.5.9...v9.6.0
 [9.5.9]: https://github.com/MetaMask/metamask-extension/compare/v9.5.8...v9.5.9
 [9.5.8]: https://github.com/MetaMask/metamask-extension/compare/v9.5.7...v9.5.8
diff --git a/app/scripts/lib/typed-message-manager.js b/app/scripts/lib/typed-message-manager.js
index 8e205520b..33bc80dd9 100644
--- a/app/scripts/lib/typed-message-manager.js
+++ b/app/scripts/lib/typed-message-manager.js
@@ -1,5 +1,5 @@
 import EventEmitter from 'events';
-import { strict as assert } from 'assert';
+import assert from 'assert';
 import { ObservableStore } from '@metamask/obs-store';
 import { ethErrors } from 'eth-rpc-errors';
 import { typedSignatureHash, TYPED_MESSAGE_SCHEMA } from 'eth-sig-util';
@@ -177,7 +177,7 @@ export default class TypedMessageManager extends EventEmitter {
         break;
       case 'V3':
       case 'V4': {
-        assert.equal(
+        assert.strictEqual(
           typeof params.data,
           'string',
           '"params.data" must be a string.',
@@ -191,7 +191,7 @@ export default class TypedMessageManager extends EventEmitter {
           data.primaryType in data.types,
           `Primary type of "${data.primaryType}" has no type definition.`,
         );
-        assert.equal(
+        assert.strictEqual(
           validation.errors.length,
           0,
           'Signing data must conform to EIP-712 schema. See https://git.io/fNtcx.',
diff --git a/package.json b/package.json
index 6d51d1787..3a2c01b76 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "metamask-crx",
-  "version": "9.6.0",
+  "version": "9.6.1",
   "private": true,
   "repository": {
     "type": "git",