diff --git a/lib/Viewer.js b/lib/Viewer.js
index d70f5f5e..894c1d1c 100644
--- a/lib/Viewer.js
+++ b/lib/Viewer.js
@@ -260,7 +260,8 @@ Viewer.prototype.on = function(event, handler) {
 Viewer.prototype._modules = [
   require('./core'),
   require('./draw'),
-  require('diagram-js/lib/features/selection')
+  require('diagram-js/lib/features/selection'),
+  require('diagram-js/lib/features/overlays')
 ];
 
 module.exports = Viewer;