How To Upgrade Server 2008 R2 PowerShell 4.0

Hi, I’m using PowerShell 1.0 in windows server 2008 R2. I experienced PowerShell 3.0 in my friends PC it looks good. So I like to upgrade my server 2008 R2 PowerShell 3.0/4.0. So help with the steps to Upgrade/Update my PowerShell. Thanks in advance.

