How to downgrade Rails version? -

i create rails application in version 3.0.7. want deploy application, server support 3.0.3

how can downloadgrade application?

thanks

replace

gem 'rails','3.0.7'

with

gem 'rails', '3.0.3'

in gemfile

then run bundle

on second note why not upgrade server rails 3.0.7?

Abdelmuti