diff --git a/CHANGELOG.md b/CHANGELOG.md
index a9f1f1b35e..6d1f0f198b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -96,6 +96,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 -  Fixes [#2472](https://github.com/microsoft/BotFramework-WebChat/issues/2472). Update samples to use repo's version of React, by [@corinagum](https://github.com/corinagum) in PR [#2478](https://github.com/microsoft/BotFramework-WebChat/pull/2478)
 -  Fixes [#2473](https://github.com/microsoft/BotFramework-WebChat/issues/2473). Fix samples 13 using wrong region for Speech Services credentials, by [@compulim](https://github.com/compulim) in PR [#2482](https://github.com/microsoft/BotFramework-WebChat/pull/2482)
 -  Fixes [#2420](https://github.com/microsoft/BotFramework-WebChat/issues/2420). Fix saga error should not result in an unhandled exception, by [@compulim](https://github.com/compulim) in PR [#2421](https://github.com/microsoft/BotFramework-WebChat/pull/2421)
+-  Fixes [#2513](https://github.com/microsoft/BotFramework-WebChat/issues/2513). Fix `core-js` not loading properly, by [@compulim](https://github.com/compulim) in PR [#2514](https://github.com/microsoft/BotFramework-WebChat/pull/2514)
 
 ### Added
 
diff --git a/packages/bundle/src/index-es5.ts b/packages/bundle/src/index-es5.ts
index f09455ab50..f032fad3df 100644
--- a/packages/bundle/src/index-es5.ts
+++ b/packages/bundle/src/index-es5.ts
@@ -5,20 +5,20 @@
 // To maintain quality, we prefer polyfills without additives
 // For example, we prefer Promise implementation from "core-js" than "bluebird"
 
+import 'core-js/features/array/find-index';
+import 'core-js/features/array/find';
+import 'core-js/features/array/includes';
+import 'core-js/features/array/iterator';
 import 'core-js/features/dom-collections';
+import 'core-js/features/math/sign';
+import 'core-js/features/number/is-finite';
+import 'core-js/features/object/assign';
+import 'core-js/features/object/values';
+import 'core-js/features/promise';
+import 'core-js/features/promise/finally';
+import 'core-js/features/string/starts-with';
+import 'core-js/features/symbol';
 
-import 'core-js/modules/es.array.find-index';
-import 'core-js/modules/es.array.find';
-import 'core-js/modules/es.array.includes';
-import 'core-js/modules/es.array.iterator';
-import 'core-js/modules/es.math.sign';
-import 'core-js/modules/es.number.is-finite';
-import 'core-js/modules/es.object.assign';
-import 'core-js/modules/es.object.values';
-import 'core-js/modules/es.promise';
-import 'core-js/modules/es.promise.finally';
-import 'core-js/modules/es.string.starts-with';
-import 'core-js/modules/es.symbol';
 import 'url-search-params-polyfill';
 import 'whatwg-fetch';
 import { version } from './index-minimal';