Invalid gemspec because of the date format in specification

Question

When I include a gem that I made, thanks to Bundler (version 1.0.12), in a Gemfile and then I try to bundle or to rake just like that:

$ rake

I\

Answer 1

You may upgraded your gem. To fix this you can edit the gemspecfile directly - from

2011-04-21 00:00:00.000000000Z

to

YYYY-MM-DD

Or upgrade your rails also

sudo gem update rails

It will fix the issue.