installing i18n_routing on heroku (i18n requires RubyGems version >= 1.3.6)

I try to deploy my first app on heroku.

I've created a gem manifest file 开发者_Python百科which include: i18n_routing --version '0.3.3'

When I push to heroku, all the gems are installed but i18n:

-----> Installing gem i18n_routing 0.3.3 from http://rubygems.org ERROR: Error installing i18n_routing: i18n requires RubyGems version >= 1.3.6

How can I update RubyGems on heroku ? Is there anything I'm missing here ? :-)

Thanks for your answers.

Fro_oo

---

Well, thanks to Sebastien Gruhier for the explanation and the solution :-)

I've migrated my app on a new Stack: bamboo-ree-1.8.7 http://docs.heroku.com/stack