diff --git a/README.md b/README.md
index c924d07..acb71d3 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # postcss-remove-null [![Build Status](https://travis-ci.org/zephraph/postcss-remove-null.svg?branch=master)](https://travis-ci.org/zephraph/postcss-remove-null)
 
+[![Greenkeeper badge](https://badges.greenkeeper.io/zephraph/postcss-remove-null.svg)](https://greenkeeper.io/)
+
 > Remove null values with PostCSS.
 
 ## Functionality
diff --git a/package.json b/package.json
index eb2bac1..a3e0321 100644
--- a/package.json
+++ b/package.json
@@ -17,16 +17,16 @@
   },
   "homepage": "https://github.com/zephraph/postcss-remove-null",
   "dependencies": {
-    "lodash": "^3.10.1",
-    "postcss": "^5.0.2",
+    "lodash": "^4.17.4",
+    "postcss": "^6.0.2",
     "require-directory": "^2.1.1"
   },
   "devDependencies": {
     "babel-cli": "^6.3.17",
     "babel-core": "^6.2.1",
     "babel-preset-es2015": "^6.1.18",
-    "babel-tape-runner": "^1.3.0",
-    "eslint": "^1.10.0",
+    "babel-tape-runner": "^2.0.1",
+    "eslint": "^4.0.0",
     "pre-commit": "^1.1.2",
     "tap-spec": "^4.1.1",
     "tape": "^4.2.2"