diff --git a/package.json b/package.json
index 2434a9cacb..c224848e40 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,8 @@
     "swiper": "^3.1.2",
     "systemjs": "0.18.10",
     "traceur": "0.0.91",
-    "zone.js": "0.5.4"
+    "zone.js": "0.5.4",
+    "rx": "2.5.1"
   },
   "devDependencies": {
     "canonical-path": "0.0.2",