diff --git a/lib/site_template/_includes/header.html b/lib/site_template/_includes/header.html
index 42d1425b..5043f539 100644
--- a/lib/site_template/_includes/header.html
+++ b/lib/site_template/_includes/header.html
@@ -1,4 +1,4 @@
-<header class="site-header">
+<header class="site-header" role="banner">
 
   <div class="wrapper">