diff --git a/demo-shell/package.json b/demo-shell/package.json
index 8386d9c97a..7bd9577d7e 100644
--- a/demo-shell/package.json
+++ b/demo-shell/package.json
@@ -98,6 +98,7 @@
     "zone.js": "0.8.14"
   },
   "devDependencies": {
+    "@angular-devkit/core": "0.0.28",
     "@angular/cli": "1.5.0",
     "@angular/compiler-cli": "5.1.1",
     "@angular/language-service": "5.1.1",