diff --git a/app/Resources/views/layout.html.twig b/app/Resources/views/layout.html.twig
index 45e9ab9..4de15df 100644
--- a/app/Resources/views/layout.html.twig
+++ b/app/Resources/views/layout.html.twig
@@ -15,7 +15,7 @@
 
   {% block css %}
     {# Bootstrap core CSS #}
-    <link href="//yastatic.net/bootstrap/3.3.1/css/bootstrap.min.css" rel="stylesheet">
+    <link href="//yastatic.net/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet">
   {% endblock %}
 
   {% block head_js %}