diff --git a/templates/framework.html b/templates/framework.html
index 313fcdfd..d8784674 100644
--- a/templates/framework.html
+++ b/templates/framework.html
@@ -5,7 +5,8 @@
     <title>{{ title }}</title>
     <style>
         html, body {
-            overflow-x: hidden;
+            height: 100%; /* ensure body fills viewport */
+            overflow-x: hidden; /* prevent horizontal scroll */
         }
     </style>
     {# TODO use bundles from bootstrap 3.3.7 #}