update

Update the current environment

$ bundle update [OPTIONS]

If you’ve made changes to your Gemfile, then you Gemfile.lock file will not match.

If you run bundle install, you’ll get an error about a mismatch.

Therefore you can do:

$ bundle update

You can also do that if there no changes in Gemfile and you just want to get newer gems.

outdated

List installed gems with newer versions available.

$ bundle outdated GEM [OPTIONS]