diff --git a/imports/startup/client/index.js b/imports/startup/client/index.js
index ccebfda..6cff432 100644
--- a/imports/startup/client/index.js
+++ b/imports/startup/client/index.js
@@ -5,4 +5,8 @@ import App from '../../ui/layouts/App/App';
 
 import '../../ui/stylesheets/app.scss';
 
-Meteor.startup(() => render(<App />, document.getElementById('react-root')));
+// https://stackoverflow.com/questions/19562207/jquery-detect-browser-ie9-and-below-and-throw-up-a-modal-to-upgrade
+const isIE9OrBelow = () => /MSIE\s/.test(navigator.userAgent) && parseFloat(navigator.appVersion.split('MSIE')[1]) < 10;
+
+if (isIE9OrBelow()) window.alert('You are using an outdated browser. Please use Chrome or Firefox to display this site.');
+else Meteor.startup(() => render(<App />, document.getElementById('react-root')));