{
  "private": true,
  "dependencies": {
    "async": "1.4.2",
    "bower": "1.5.2",
    "cogs": "1.0.5",
    "cogs-transformer-babel": "1.0.12",
    "cogs-transformer-concat-amd": "1.0.6",
    "cogs-transformer-directives": "1.0.3",
    "cogs-transformer-prepend-path": "1.0.2",
    "cogs-transformer-text": "1.0.3",
    "cogs-transformer-uglify-js": "1.0.2",
    "express": "4.13.3",
    "knex": "0.8.6",
    "nodemailer": "1.4.0",
    "nodemailer-ses-transport": "1.3.0",
    "pg": "4.4.1",
    "socket.io": "1.3.6",
    "watchy": "0.6.4"
  },
  "engines": {
    "node": "4.1.0"
  },
  "scripts": {
    "postinstall": "make postinstall",
    "start": "make start"
  }
}

{
  "private": true,
  "dependencies": {
    "async": "1.4.2",
    "bower": "1.5.2",
    "cogs": "1.0.5",
    "cogs-transformer-babel": "1.0.12",
    "cogs-transformer-concat-amd": "1.0.6",
    "cogs-transformer-directives": "1.0.3",
    "cogs-transformer-prepend-path": "1.0.2",
    "cogs-transformer-text": "1.0.3",
    "cogs-transformer-uglify-js": "1.0.2",
    "express": "4.13.3",
    "knex": "0.8.6",
    "nodemailer": "1.4.0",
    "nodemailer-ses-transport": "1.3.0",
    "pg": "4.4.1",
    "socket.io": "1.3.6",
    "watchy": "0.6.4"
  },
  "engines": {
    "node": "4.1.0"
  },
  "cacheDirectories": ["node_modules", "bower_components"],
  "scripts": {
    "postinstall": "make postinstall",
    "start": "make start"
  }
}

Add cacheDirectories field for heroku
Add cacheDirectories field for heroku
