diff --git a/app/frontend/application.js b/app/frontend/application.js
index a0c63f365..179355568 100644
--- a/app/frontend/application.js
+++ b/app/frontend/application.js
@@ -3,6 +3,7 @@
 // a relevant structure within app/javascript and only use these pack files to reference
 // that code so it'll be compiled.
 require.context("govuk-frontend/govuk/assets")
+import "core-js/features/promise"
 
 import "./styles/application.scss"
 import "./controllers"
diff --git a/package.json b/package.json
index efebb4909..f478b247d 100644
--- a/package.json
+++ b/package.json
@@ -18,10 +18,12 @@
     "chart.js": "^3.6.0",
     "chartkick": "^4.1.0",
     "copy-webpack-plugin": "^10.2.4",
+    "core-js": "^3.21.1",
     "css-loader": "^6.7.1",
     "file-loader": "^6.2.0",
     "govuk-frontend": "^4.0.1",
     "mini-css-extract-plugin": "^2.6.0",
+    "regenerator-runtime": "^0.13.9",
     "sass": "^1.49.9",
     "sass-loader": "^12.6.0",
     "stimulus": "^3.0.0",
@@ -36,9 +38,9 @@
       "@babel/preset-env"
     ],
     "plugins": [
-     "@babel/plugin-proposal-class-properties",
-     "@babel/plugin-proposal-private-methods"
-   ]
+      "@babel/plugin-proposal-class-properties",
+      "@babel/plugin-proposal-private-methods"
+    ]
   },
   "scripts": {
     "build": "webpack --config webpack.config.js"
diff --git a/webpack.config.js b/webpack.config.js
index 7a4cf25ae..7af8a0f5f 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -17,7 +17,7 @@ module.exports = {
     application: [
       "./app/frontend/application.js",
     ],
-    active_admin:[
+    active_admin: [
       './app/frontend/active_admin.js',
       './app/frontend/styles/active_admin.scss'
     ]
diff --git a/yarn.lock b/yarn.lock
index c99037e96..10cf5d06c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1470,6 +1470,11 @@ core-js-compat@^3.20.2, core-js-compat@^3.21.0:
     browserslist "^4.19.1"
     semver "7.0.0"
 
+core-js@^3.21.1:
+  version "3.21.1"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.21.1.tgz#f2e0ddc1fc43da6f904706e8e955bc19d06a0d94"
+  integrity sha512-FRq5b/VMrWlrmCzwRrpDYNxyHP9BcAZC+xHJaqTgIE5091ZV1NTmyh0sGOg5XqpnHvR0svdy0sv1gWA1zmhxig==
+
 cosmiconfig@^7.0.0:
   version "7.0.1"
   resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-7.0.1.tgz#714d756522cace867867ccb4474c5d01bbae5d6d"
@@ -2302,7 +2307,7 @@ regenerate@^1.4.2:
   resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.4.2.tgz#b9346d8827e8f5a32f7ba29637d398b69014848a"
   integrity sha512-zrceR/XhGYU/d/opr2EKO7aRHUeiBI8qjtfHqADTwZd6Szfy16la6kqD0MIUs5z5hx6AaKa+PixpPrR289+I0A==
 
-regenerator-runtime@^0.13.4:
+regenerator-runtime@^0.13.4, regenerator-runtime@^0.13.9:
   version "0.13.9"
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.13.9.tgz#8925742a98ffd90814988d7566ad30ca3b263b52"
   integrity sha512-p3VT+cOEgxFsRRA9X4lkI1E+k2/CtnKtU4gcxyaCUreilL/vqI6CdZ3wxVUx3UOUg+gnUOQQcRI7BmSI656MYA==