diff --git a/demo-shell/package.json b/demo-shell/package.json
index d0ee9be023..f6624027fc 100644
--- a/demo-shell/package.json
+++ b/demo-shell/package.json
@@ -111,6 +111,7 @@
     "karma-jasmine": "~1.1.0",
     "karma-jasmine-html-reporter": "^0.2.2",
     "protractor": "~5.1.2",
+    "rimraf": "^2.6.2",
     "ts-node": "~3.2.0",
     "tslint": "~5.7.0",
     "typescript": "~2.4.2"