upgrading from rails2.3.5 to rails2.3.8

Hi
  Please guide me to upgrade my rails application which is 2.3.5 version
to 2.3.8 step by step.

Thanks for your help
Tom

Tom Mac wrote:

Hi
  Please guide me to upgrade my rails application which is 2.3.5 version
to 2.3.8 step by step.

sudo gem update

I don't remember any bad issue I fell into.