diff --git a/package.json b/package.json
index 99640ae..4beaf20 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "test": "mocha --recursive test"
   },
   "dependencies": {
-    "async": "1.5.2",
+    "async": "2.1.2",
     "commander": "2.9.0",
     "globby": "^5.0.0",
     "graceful-fs": "4.1.6",