diff --git a/package.json b/package.json
index c04cc5e..93177c6 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     }
   ],
   "dependencies": {
-    "async": "*"
+    "async": "1.5.2"
   },
   "devDependencies": {
     "optimist": "*"