diff --git a/.gitignore b/.gitignore
index 3c3629e..c9106a7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 node_modules
+.nyc_output
diff --git a/.travis.yml b/.travis.yml
index e667b92..17f844e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,3 +3,4 @@ node_js:
   - 'iojs'
   - '0.12'
   - '0.10'
+after_success: npm run coverage
diff --git a/package.json b/package.json
index 3580de7..9fc8cf3 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,8 @@
     "node": ">=0.10.0"
   },
   "scripts": {
-    "test": "xo && node test.js"
+    "test": "xo && nyc node test.js",
+    "coverage": "nyc --reporter=text-lcov node test.js | coveralls"
   },
   "files": [
     "index.js"
@@ -56,6 +57,8 @@
   "devDependencies": {
     "ava": "0.0.4",
     "chalk": "^1.1.0",
+    "coveralls": "^2.11.4",
+    "nyc": "^3.2.2",
     "strip-ansi": "^3.0.0",
     "xo": "*"
   }
diff --git a/readme.md b/readme.md
index 25b1554..fbe2a6d 100644
--- a/readme.md
+++ b/readme.md
@@ -1,4 +1,4 @@
-# wrap-ansi [![Build Status](https://travis-ci.org/chalk/wrap-ansi.svg?branch=master)](https://travis-ci.org/chalk/wrap-ansi)
+# wrap-ansi [![Build Status](https://travis-ci.org/chalk/wrap-ansi.svg?branch=master)](https://travis-ci.org/chalk/wrap-ansi) [![Coverage Status](https://coveralls.io/repos/chalk/wrap-ansi/badge.svg?branch=master&service=github)](https://coveralls.io/github/chalk/wrap-ansi?branch=master)
 
 > Wordwrap a string with [ANSI escape codes](http://en.wikipedia.org/wiki/ANSI_escape_code#Colors_and_Styles)