diff --git a/index.html b/index.html
index cdd0fa68..ac2dbc1f 100644
--- a/index.html
+++ b/index.html
@@ -1,7 +1,7 @@
 ---
 ---
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
   <title>The U.S. Digital Services Playbook</title>
   <meta charset='UTF-8'/>
@@ -82,4 +82,4 @@ <h2 class="display">{{ play.title }}</h2>
 <script src='{{site.baseurl}}/assets/js/site.js'></script>
 <script id="_fed_an_js_tag" type="text/javascript" src="{{site.baseurl}}/assets/js/federated-analytics.all.min.js?agency=GSA&sub-agency=OGP"></script>
 </body>
-</html>
\ No newline at end of file
+</html>
