diff --git a/lib/Viewer.js b/lib/Viewer.js
index 00841e0e..dbb22dd7 100644
--- a/lib/Viewer.js
+++ b/lib/Viewer.js
@@ -220,7 +220,8 @@ Viewer.prototype.on = function(event, handler) {
 
 // modules that comprise the bpmn viewer
 Viewer.prototype._modules = [
-  require('./core')
+  require('./core'),
+  require('diagram-js/lib/features/selection')
 ];
 
 module.exports = Viewer;