diff --git a/README.md b/README.md
index dea470d..0ceedbf 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,8 @@ Jade Tumblr Mixins
 
 
 ## Installation
+
+[![Greenkeeper badge](https://badges.greenkeeper.io/hhsnopek/jumblr.svg)](https://greenkeeper.io/)
 - npm: `npm i jumblr`
 - tarball: see [latest releases](https://github.com/hhsnopek/jumblr/releases)
 
diff --git a/package.json b/package.json
index bb3f187..00b13d7 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "mocha": "3.2.0",
     "chai": "3.5.0",
     "coffeelint": "1.x",
-    "coffee-script": "1.12.1",
+    "coffee-script": "1.12.4",
     "jade": "1.11.0"
   },
   "scripts": {