sarco@Sarcobook ~/Documents/rails_projects/sample_app $ bundle install --without production Fetching gem metadata from https://rubygems.org/......... Fetching additional metadata from https://rubygems.org/.. Resolving dependencies... Bundler could not find compatible versions for gem "railties": In snapshot (Gemfile.lock): railties (4.1.0) In Gemfile: rails (= 4.0.5) ruby depends on railties (= 4.0.5) ruby Running `bundle update` will rebuild your snapshot from scratch, using only the gems in your Gemfile, which may resolve the conflict.