diff --git a/.travis.yml b/.travis.yml
index 77efc17..06ba4ee 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,5 @@
 language: node_js
 node_js:
-  - "0.12"
   - "4"
   - "6"
   - "7"
diff --git a/README.md b/README.md
index a1ff5c2..e5b990a 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,14 @@
-espower-typescript [![npm version][npm-image]][npm-url] [![build status][travis-image]][travis-url] [![Dependency Status][deps-image]][deps-url]
+espower-typescript
 ====
 
 > power-assert instrumentor for TypeScript
 
+[![npm version][npm-image]][npm-url]
+![Node.js Version Support][node-version]
+[![build status][travis-image]][travis-url]
+[![Dependency Status][deps-image]][deps-url]
+![License][license]
+
 ## Install
 
 ```console
@@ -11,6 +17,7 @@ $ npm install -D espower-typescript
 
 ## TypeScript versions
 
+* espower-typescript v8.x uses TypeScript v2.2
 * espower-typescript v7.x uses TypeScript v2.1
 * espower-typescript v6.x uses TypeScript v2.0
 * espower-typescript v5.x uses TypeScript v1.8
@@ -72,3 +79,5 @@ Note: only `compilerOptions` field in tsconfig.json is applied.
 [travis-url]: https://travis-ci.org/power-assert-js/espower-typescript
 [deps-image]: https://david-dm.org/power-assert-js/espower-typescript.svg
 [deps-url]: https://david-dm.org/power-assert-js/espower-typescript
+[node-version]: https://img.shields.io/badge/Node.js%20support-v4,v6,v7-brightgreen.svg
+[license]: https://img.shields.io/npm/l/espower-typescript.svg
diff --git a/package.json b/package.json
index cf7692c..62f5401 100644
--- a/package.json
+++ b/package.json
@@ -1,13 +1,30 @@
 {
   "name": "espower-typescript",
-  "version": "7.0.1",
   "description": "power-assert instrumentor for TypeScript",
+  "version": "7.0.1",
+  "author": "Teppei Sato <teppeis@gmail.com>",
+  "engines": {
+    "node": ">=4"
+  },
   "main": "index.js",
   "scripts": {
     "demo": "mocha --require './guess' test/demo.ts",
-    "test:outdir": "cd test/test-outdir && mocha --require ../../guess test/*_test.ts",
-    "test": "mocha --require './guess' test/*_test.ts && npm run test:outdir"
+    "test": "mocha --require './guess' test/*_test.ts && npm run test:outdir",
+    "test:outdir": "cd test/test-outdir && mocha --require ../../guess test/*_test.ts"
+  },
+  "dependencies": {
+    "espower-source": "^2.0.0",
+    "minimatch": "^3.0.3",
+    "typescript": "^2.2.1",
+    "typescript-simple": "^8.0.0"
+  },
+  "devDependencies": {
+    "expect.js": "^0.3.1",
+    "mocha": "^3.1.2",
+    "power-assert": "^1.2.0",
+    "react": "^15.3.2"
   },
+  "homepage": "https://github.com/power-assert-js/espower-typescript",
   "repository": {
     "type": "git",
     "url": "https://github.com/power-assert-js/espower-typescript"
@@ -15,23 +32,9 @@
   "bugs": {
     "url": "https://github.com/power-assert-js/espower-typescript/issues"
   },
-  "homepage": "https://github.com/power-assert-js/espower-typescript",
   "keywords": [
     "power-assert",
     "typescript"
   ],
-  "author": "Teppei Sato <teppeis@gmail.com>",
-  "license": "MIT",
-  "devDependencies": {
-    "expect.js": "^0.3.1",
-    "mocha": "^3.1.2",
-    "power-assert": "^1.2.0",
-    "react": "^15.3.2"
-  },
-  "dependencies": {
-    "espower-source": "^2.0.0",
-    "minimatch": "^3.0.3",
-    "typescript": "~2.1.4",
-    "typescript-simple": "^7.0.0"
-  }
+  "license": "MIT"
 }