Request to http://ift.tt/28IDlnQ failed: self signed certificate in certificate chain

I am new to ember.js.

While trying to get started in ember.js , it asked me install bower.

While doing $bower install i am getting the message.

bower ember-cli-test-loader#0.2.2SELF_SIGNED_CERT_IN_CHAIN Request to http://ift.tt/28IDlnQ failed: self signed certificate in certificate chain

Please help me to resolve this.