diff --git a/package.json b/package.json
index 6928bb4..c449772 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
   },
   "dependencies": {
     "array-flatten": "^2.1.1",
-    "async": "^2.4.0",
+    "async": "^3.2.2",
     "concat-stream": "^1.6.0",
     "coreutils.js": "github:piranna/coreutils.js",
     "decode-prompt": "^0.0.2",