Unable to vagrant box add laravel/homestead (errno 60 / SSL read)

Basically I got this error seconds after I trigger vagrant box add laravel/homestead in my terminal.

What's more interesting, after second failed attempt, the error message is a little bit different (as you see).

Error number 60 is somehow related to SSL. Since I'm running this command via terminal, I really have no idea how to investigate this issue. Can somebody give me any hints? May it be related to poor wireless internet connection?

slick-mac:~ slick$ vagrant version
Installed Version: 1.7.4
Latest Version: 1.7.4

You're running an up-to-date version of Vagrant!

via Chebli Mohamed