diff --git a/index.html b/index.html
index 6eda2bd..d8ed99d 100644
--- a/index.html
+++ b/index.html
@@ -59,6 +59,12 @@
                 <input type="text" class="js-key base-key-input wide">
               </div>
             </div>
+
+            <!-- TODO add options to interface -->
+            <input type="hidden" class="js-totp-algo" value="SHA1">
+            <input type="hidden" class="js-totp-digits" value="6">
+            <input type="hidden" class="js-totp-period" value="30">
+
             <div class="form-group">
               <div class="col-sm-offset-6 col-xs-6">
                 <button type="button" class="btn btn-default js-generate regenerate">Regenerate</button>