{
  "name": "Soulheart",
  "description": "Autocomplete remote data source",
  "repository": "https://github.com/sethherr/soulheart",
  "logo": "https://raw.githubusercontent.com/sethherr/soulheart/master/examples/logo.png",
  "keywords": [
    "ruby",
    "autocomplete",
    "redis",
    "heart",
    "typeahead"
  ],
  "addons": [
    "heroku-redis:hobby-dev"
  ],
  "env": {
    "CUSTOM_RUBY_VERSION": "2.2.2"
  }
}

{
  "name": "Soulheart",
  "description": "Autocomplete remote data source",
  "repository": "https://github.com/sethherr/soulheart",
  "logo": "https://raw.githubusercontent.com/sethherr/soulheart/master/examples/logo.png",
  "keywords": [
    "ruby",
    "autocomplete",
    "redis",
    "heart",
    "typeahead"
  ],
  "addons": [
    "heroku-redis:hobby-dev"
  ],
  "env": {
    "CUSTOM_RUBY_VERSION": "2.2.5"
  }
}

Update ruby version in package.json
Update ruby version in package.json