diff --git a/README.md b/README.md
index 8e321b7..94f7131 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # bouton.js
 
+[![Greenkeeper badge](https://badges.greenkeeper.io/bhou/bouton.js.svg)](https://greenkeeper.io/)
+
 ![build status](https://travis-ci.org/bhou/bouton.js.svg?branch=master)
 
 A framework to build your reactive library. It provides a basic feature set for your reactive library:
diff --git a/package.json b/package.json
index fa58c60..25c4f52 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "A framework to build your reactive library",
   "main": "lib/index.js",
   "dependencies": {
-    "eventemitter3": "^1.2.0",
+    "eventemitter3": "^2.0.2",
     "uuid": "^3.0.1"
   },
   "devDependencies": {
@@ -16,9 +16,9 @@
     "babel-plugin-transform-object-rest-spread": "^6.8.0",
     "babel-preset-es2015": "^6.6.0",
     "babel-preset-react": "^6.5.0",
-    "flow-bin": "^0.27.0",
-    "nodeunit": "^0.9.1",
-    "webpack": "^1.13.1"
+    "flow-bin": "^0.38.0",
+    "nodeunit": "^0.10.2",
+    "webpack": "^2.2.1"
   },
   "scripts": {
     "test": "node_modules/nodeunit/bin/nodeunit test",