diff --git a/README.md b/README.md
index b0882c2..dcc910c 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # skewered [![NPM version][npm-image]][npm-url] [![Build Status][travis-image]][travis-url] [![Dependency Status][daviddm-image]][daviddm-url] [![Coverage percentage][coveralls-image]][coveralls-url]
 
+[![Greenkeeper badge](https://badges.greenkeeper.io/busterc/skewered.svg)](https://greenkeeper.io/)
+
 > The simplest slugify module in the universe.
 
 ## Prerequisites
diff --git a/package.json b/package.json
index fc3a562..7bbcc29 100644
--- a/package.json
+++ b/package.json
@@ -28,17 +28,17 @@
     "skewer"
   ],
   "devDependencies": {
-    "coveralls": "^2.13.1",
-    "nsp": "^2.6.3",
-    "eslint": "^4.1.0",
+    "coveralls": "^3.0.2",
+    "nsp": "^3.2.1",
+    "eslint": "^5.4.0",
     "prettier": "^1.7.0",
     "husky": "^0.14.3",
-    "lint-staged": "^4.2.1",
-    "eslint-config-prettier": "^2.4.0",
+    "lint-staged": "^7.2.2",
+    "eslint-config-prettier": "^3.0.1",
     "eslint-plugin-prettier": "^2.2.0",
-    "eslint-config-xo": "^0.18.2",
-    "jest": "^21.0.0",
-    "jest-cli": "^21.0.0"
+    "eslint-config-xo": "^0.24.2",
+    "jest": "^23.5.0",
+    "jest-cli": "^23.5.0"
   },
   "scripts": {
     "prepublish": "nsp check",