README.md in secure_headers-3.6.6 vs README.md in secure_headers-3.6.7

@@ -89,9 +89,10 @@
     connect_src: %w(wss:),
     font_src: %w('self' data:),
     form_action: %w('self' github.com),
     frame_ancestors: %w('none'),
     img_src: %w(mycdn.com data:),
+    manifest_src: %w('self'),
     media_src: %w(utoob.com),
     object_src: %w('self'),
     plugin_types: %w(application/x-shockwave-flash),
     script_src: %w('self'),
     style_src: %w('unsafe-inline'),