diff --git a/package.json b/package.json
index 2f712d9..f82cdf5 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "chai": "3.5.0",
-    "chai-as-promised": "5.3.0",
+    "chai-as-promised": "6.0.0",
     "coffee-script": "1.11.0",
     "coveralls": "2.x",
     "istanbul": "0.4.5",