diff --git a/package.json b/package.json
index f37cb69..7454069 100644
--- a/package.json
+++ b/package.json
@@ -73,7 +73,7 @@
     "mocha-istanbul": "^0.2.0",
     "node-libs-browser": "^0.5.2",
     "q": "^1.2.0",
-    "rx": "^4.0.0",
+    "rx": "^4.0.8",
     "sinon": "^1.11.1",
     "sinon-chai": "^2.7.0",
     "webpack": "^1.10.1"