diff --git a/README.md b/README.md
index 6834b169d..15630d50d 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 The official low-level Elasticsearch client for Node.js and the browser.
 
-[![Build Status](https://travis-ci.org/elasticsearch/elasticsearch-js.png?branch=1.5)](https://travis-ci.org/elasticsearch/elasticsearch-js) [![Coverage Status](https://coveralls.io/repos/elasticsearch/elasticsearch-js/badge.png)](https://coveralls.io/r/elasticsearch/elasticsearch-js) [![Dependencies up to date](https://david-dm.org/elasticsearch/elasticsearch-js.png)](https://david-dm.org/elasticsearch/elasticsearch-js)
+[![Build Status](https://travis-ci.org/elasticsearch/elasticsearch-js.png?branch=1.5)](https://travis-ci.org/elasticsearch/elasticsearch-js?branch=1.5) [![Coverage Status](https://coveralls.io/repos/elasticsearch/elasticsearch-js/badge.png)](https://coveralls.io/r/elasticsearch/elasticsearch-js) [![Dependencies up to date](https://david-dm.org/elasticsearch/elasticsearch-js.png)](https://david-dm.org/elasticsearch/elasticsearch-js)
 
 ## Features
 
diff --git a/package.json b/package.json
index d6d376807..35a6fccff 100644
--- a/package.json
+++ b/package.json
@@ -69,7 +69,7 @@
     "chalk": "~0.4",
     "forever-agent": "0.5.2",
     "lodash-node": "~2.4",
-    "when": "~2.8"
+    "when": "^3.0.1"
   },
   "repository": {
     "type": "git",