diff --git a/web/react/components/team_signup_username_page.jsx b/web/react/components/team_signup_username_page.jsx
index b5c8b14dfc..984c7afabf 100644
--- a/web/react/components/team_signup_username_page.jsx
+++ b/web/react/components/team_signup_username_page.jsx
@@ -22,7 +22,7 @@ export default class TeamSignupUsernamePage extends React.Component {
     submitNext(e) {
         e.preventDefault();
 
-        var name = React.findDOMNode(this.refs.name).value.trim();
+        var name = React.findDOMNode(this.refs.name).value.trim().toLowerCase();
 
         var usernameError = Utils.isValidUsername(name);
         if (usernameError === 'Cannot use a reserved word as a username.') {