diff --git a/package.json b/package.json
index 2bd4215..76c91ab 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "test": "test"
   },
   "dependencies": {
-    "async": "^1.5.2",
+    "async": "^3.2.2",
     "mocha-phantomjs-core": "^1.3.0",
     "object-assign": "^4.1.0",
     "phantomjs-prebuilt": "^2.1.3"