Hi, I encounter a problem with dependencies, I simply changed ~> to >= and it now works :)

previously, at bundle update, I had:

    Bundler could not find compatible versions for gem "guard":
      In Gemfile:
        guard-coffeescript (~> 1.2.0) ruby depends on
          guard (>= 1.1.0) ruby
        guard-sprockets (>= 0) ruby depends on
          guard (0.2.2)

now it accept guard 1.3.2