Migrating to Dotcloud CLI 0.4.x with 'pip: error: no such option: -u'

Checking the version number
$ dotcloud --version
DotCloud CLI version 0.3.1

Installing Pip (it is a tool for installing and managing Python packages)
$ sudo easy_install pip

Installing the dotcloud CLI 0.4.x
$ sudo pip install --upgrade dotcloud


In the dotcloud migration document they use pip -U but in Pip version 1.0.1 there is no such an option.

Checking the version number again.
$ dotcloud --version
DotCloud CLI version 0.4.0

All right.