diff --git a/.gitignore b/.gitignore
index c2658d7..25fbf5a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 node_modules/
+coverage/
diff --git a/.npmignore b/.npmignore
index c73bfbc..5c0673e 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,5 +1,9 @@
 # node
 node_modules/
 
-# Else
+# test
+coverage/
+specs/
+
+# else
 .editorconfig
diff --git a/.travis.yml b/.travis.yml
index 4126955..a46098d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,3 +23,6 @@ branches:
 
 script:
   - "npm test"
+
+after_script:
+  - cat coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
diff --git a/README.md b/README.md
index 56a0783..c370f8c 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 NIME
 =============
-[![npm][npm-image]][npm-url] [![Build Status][travis-ci-image]][travis-ci-url]
+[![npm][npm-image]][npm-url] [![Build Status][travis-ci-image]][travis-ci-url] [![Coveralls][coveralls-img]][coveralls-url]
 
 Implement input methods easily for Windows with nodejs. It is another [PIME](https://github.com/EasyIME/PIME) server side.
 
@@ -112,3 +112,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 [travis-ci-image]: https://img.shields.io/travis/EasyIME/NIME.svg?style=flat-square
 [travis-ci-url]: https://travis-ci.org/EasyIME/NIME
+
+[coveralls-img]: https://img.shields.io/coveralls/EasyIME/nime.svg?style=flat-square
+[coveralls-url]: https://coveralls.io/github/EasyIME/nime
diff --git a/package.json b/package.json
index da798f0..b84a44f 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "start": "cd example && node index.js",
-    "test": "mocha specs --ui bdd --require specs/helpers/chai.js --reporter spec"
+    "test": "istanbul cover -x specs/** ./node_modules/mocha/bin/_mocha specs -- --require specs/helpers/chai.js --reporter spec"
   },
   "author": "Lee <jessy1092@gmail.com>",
   "license": "MIT",
@@ -21,6 +21,8 @@
   },
   "devDependencies": {
     "chai": "^3.5.0",
+    "coveralls": "^2.11.8",
+    "istanbul": "^0.4.2",
     "mocha": "^2.4.5",
     "sinon": "^1.17.3"
   }