diff --git a/sdc-workflow-designer-ui/package.json b/sdc-workflow-designer-ui/package.json
index 2b8cf2b..4ee3d5e 100644
--- a/sdc-workflow-designer-ui/package.json
+++ b/sdc-workflow-designer-ui/package.json
@@ -27,6 +27,7 @@
     "font-awesome": "^4.7.0",
     "jsplumb": "2.5.0",
     "ngx-bootstrap": "^1.9.1",
+    "ngx-tree-select": "^0.11.1",
     "primeng": "^4.2.0-rc.1",
     "rxjs": "^5.4.2",
     "zone.js": "^0.8.14"