diff --git a/packages/optimizely-sdk/CHANGELOG.MD b/packages/optimizely-sdk/CHANGELOG.MD
index 7c03837d9..66f779f52 100644
--- a/packages/optimizely-sdk/CHANGELOG.MD
+++ b/packages/optimizely-sdk/CHANGELOG.MD
@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [4.6.0] - May 27, 2021
+
+### New Features
+- Added support for multiple concurrent prioritized experiments per flag ([#664](https://github.com/optimizely/javascript-sdk/pull/664))
+
+### Bug fixes
 - Bumped `datafile-manager` and `event-processor` packages to version `0.8.1`.
 
 ## [4.5.1] - March 2, 2021
diff --git a/packages/optimizely-sdk/lib/index.browser.tests.js b/packages/optimizely-sdk/lib/index.browser.tests.js
index 940c4fa3b..0ac5c5262 100644
--- a/packages/optimizely-sdk/lib/index.browser.tests.js
+++ b/packages/optimizely-sdk/lib/index.browser.tests.js
@@ -148,7 +148,7 @@ describe('javascript-sdk', function() {
         optlyInstance.onReady().catch(function() {});
 
         assert.instanceOf(optlyInstance, Optimizely);
-        assert.equal(optlyInstance.clientVersion, '4.5.1');
+        assert.equal(optlyInstance.clientVersion, '4.6.0');
       });
 
       it('should set the JavaScript client engine and version', function() {
diff --git a/packages/optimizely-sdk/lib/index.node.tests.js b/packages/optimizely-sdk/lib/index.node.tests.js
index 24ea1e37a..38629fe45 100644
--- a/packages/optimizely-sdk/lib/index.node.tests.js
+++ b/packages/optimizely-sdk/lib/index.node.tests.js
@@ -90,7 +90,7 @@ describe('optimizelyFactory', function() {
         optlyInstance.onReady().catch(function() {});
 
         assert.instanceOf(optlyInstance, Optimizely);
-        assert.equal(optlyInstance.clientVersion, '4.5.1');
+        assert.equal(optlyInstance.clientVersion, '4.6.0');
       });
 
       describe('event processor configuration', function() {
diff --git a/packages/optimizely-sdk/lib/index.react_native.tests.js b/packages/optimizely-sdk/lib/index.react_native.tests.js
index cdcdba735..d7d28c421 100644
--- a/packages/optimizely-sdk/lib/index.react_native.tests.js
+++ b/packages/optimizely-sdk/lib/index.react_native.tests.js
@@ -89,7 +89,7 @@ describe('javascript-sdk/react-native', function() {
         optlyInstance.onReady().catch(function() {});
 
         assert.instanceOf(optlyInstance, Optimizely);
-        assert.equal(optlyInstance.clientVersion, '4.5.1');
+        assert.equal(optlyInstance.clientVersion, '4.6.0');
       });
 
       it('should set the Javascript client engine and version', function() {
diff --git a/packages/optimizely-sdk/lib/utils/enums/index.ts b/packages/optimizely-sdk/lib/utils/enums/index.ts
index 1e40ba565..a98f8b07d 100644
--- a/packages/optimizely-sdk/lib/utils/enums/index.ts
+++ b/packages/optimizely-sdk/lib/utils/enums/index.ts
@@ -176,7 +176,7 @@ export const CONTROL_ATTRIBUTES = {
 export const JAVASCRIPT_CLIENT_ENGINE = 'javascript-sdk';
 export const NODE_CLIENT_ENGINE = 'node-sdk';
 export const REACT_CLIENT_ENGINE = 'react-sdk';
-export const NODE_CLIENT_VERSION = '4.5.1';
+export const NODE_CLIENT_VERSION = '4.6.0';
 
 export const VALID_CLIENT_ENGINES = [
   NODE_CLIENT_ENGINE,
diff --git a/packages/optimizely-sdk/package-lock.json b/packages/optimizely-sdk/package-lock.json
index 07df97eff..fa2f975d7 100644
--- a/packages/optimizely-sdk/package-lock.json
+++ b/packages/optimizely-sdk/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@optimizely/optimizely-sdk",
-  "version": "4.5.1",
+  "version": "4.6.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
diff --git a/packages/optimizely-sdk/package.json b/packages/optimizely-sdk/package.json
index 0ba386bf3..26c31b056 100644
--- a/packages/optimizely-sdk/package.json
+++ b/packages/optimizely-sdk/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@optimizely/optimizely-sdk",
-  "version": "4.5.1",
+  "version": "4.6.0",
   "description": "JavaScript SDK for Optimizely X Full Stack",
   "module": "dist/optimizely.browser.es.min.js",
   "main": "dist/optimizely.node.min.js",