{
  "name": "sage",
  "homepage": "https://roots.io/sage/",
  "authors": [
    "Ben Word <ben@benword.com>"
  ],
  "license": "MIT",
  "private": true,
  "dependencies": {
    "bootstrap": "git://github.com/twbs/bootstrap.git#v4.0.0-beta",
    "popper.js": "^1.12.3"
  }
}

{
  "name": "sage",
  "homepage": "https://roots.io/sage/",
  "authors": [
    "Ben Word <ben@benword.com>"
  ],
  "license": "MIT",
  "private": true,
  "dependencies": {
    "bootstrap": "git://github.com/twbs/bootstrap.git#v4.0.0-beta.2",
    "popper.js": "^1.12.3"
  }
}

Update to Bootstrap 4 beta 2.
Update to Bootstrap 4 beta 2.