bower install not updating packages

[Aashi Malhotra]

 "devDependencies": {

    "bootstrap": "~3.3.2",

    "components-font-awesome": "~4.3.0",

    "html5shiv": "~3.7.2",

    "jwplayer": "~6.10.4906",

    "toastr": "~2.1.2",

    "email-registration-popup": null,

    "highcharts": "~4.1.8"

  }

This is my bower.json.

The bower component email-registration-popup is not getting updated even after writing "bower install -f" . please suggest some method to update latest version.