I have always use jeweler to develop my gems. I decided recently to simply rely on bundler but I missed so much the helper rake tasks to manage version that I reimplemented for bundler.

Add this gem (bundler-gem_version_tasks) as a development dependency in your gemspec:

spec.add_development_dependency 'bundler-gem_version_tasks'

Add this to your Rakefile, instead of require 'bundler/gem_tasks':

require "bundler/gem_version_tasks"

rake version             # print current version
rake version:bump:major  # Bump the major version by 1
rake version:bump:minor  # Bump the minor version by 1
rake version:bump:patch  # Bump the patch version by 1
rake version:write       # write a specific version - example: rake version:write VERSION=1.2.3

1. Fork it ( https://github.com/[my-github-username]/bundler-gem_version_tasks/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request