diff --git a/dashboard/authcallback.html b/dashboard/authcallback.html
index 18aa663e3..f023edaea 100644
--- a/dashboard/authcallback.html
+++ b/dashboard/authcallback.html
@@ -1,3 +1,5 @@
+<!DOCTYPE html>
+
 <script>
 
 const tmp = window.location.hash.slice(1).split('&');
@@ -7,7 +9,7 @@ tmp.forEach(function (pair) {
     if (pair.indexOf('access_token=') === 0) localStorage.token = pair.split('=')[1];
 });
 
-const redirectTo = '/';
+let redirectTo = '/';
 if (localStorage.getItem('redirectToHash')) {
     redirectTo += localStorage.getItem('redirectToHash');
     localStorage.removeItem('redirectToHash');
