diff --git a/package.json b/package.json
index 819aca7..98ab452 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   },
   "homepage": "https://github.com/hyperlink/elector#readme",
   "dependencies": {
-    "async": "^2.6.0",
+    "async": "^3.0.1",
     "debug": "^4.0.0",
     "lodash": "^4.17.4",
     "node-zookeeper-client": "^0.2.2"