diff --git a/app/javascript/packs/application-old.js b/app/javascript/packs/application-old.js
index a4f7c54ed..6926ac025 100644
--- a/app/javascript/packs/application-old.js
+++ b/app/javascript/packs/application-old.js
@@ -6,6 +6,11 @@ import Highcharts from 'highcharts';
 import Bloodhound from 'bloodhound-js';
 import jQuery from 'jquery';
 
+// Include runtime-polyfills for older browsers.
+// Due to .babelrc's 'useBuiltIns', only polyfills actually
+// required by the browsers we support will be included.
+import 'babel-polyfill';
+
 import 'select2';
 import 'typeahead.js';
 
diff --git a/app/javascript/packs/application.js b/app/javascript/packs/application.js
index 78649f91c..73f5862e8 100644
--- a/app/javascript/packs/application.js
+++ b/app/javascript/packs/application.js
@@ -6,6 +6,11 @@ import Chartkick from 'chartkick';
 import Highcharts from 'highcharts';
 import jQuery from 'jquery';
 
+// Include runtime-polyfills for older browsers.
+// Due to .babelrc's 'useBuiltIns', only polyfills actually
+// required by the browsers we support will be included.
+import 'babel-polyfill';
+
 import 'select2';
 import 'typeahead.js';