title: Getting error: update rubygems while deploying/migrating to Heroku
body: <p>I am getting the following error when migrating to Heroku.</p>
  
  <blockquote>
    <p><code>Installing hoe (2.9.4) /usr/ruby1.9.2/lib/ruby/1.9.1/rubygems/installer.rb:170:in &gt;</code>install': hoe requires RubyGems version >= 1.4. Try 'gem update --system' to update RubyGems itself. (Gem::InstallError)`</p>
  </blockquote>
  
  <p>It sais that the ruby gems version is out of date. Somebody knows how i could solve this problem?</p>
  
  <p>using rails 3.0.5 with ruby 1.9.2</p>
  
  <p><code>bundler</code></p>
  
  <pre><code>Using rake (0.8.7) 
  Using RedCloth (4.2.2) 
  Using abstract (1.0.0) 
  Using activesupport (3.0.5) 
  Using builder (2.1.2) 
  Using i18n (0.5.0) 
  Using activemodel (3.0.5) 
  Using erubis (2.6.6) 
  Using rack (1.2.2) 
  Using rack-mount (0.6.14) 
  Using rack-test (0.5.7) 
  Using tzinfo (0.3.26) 
  Using actionpack (3.0.5) 
  Using mime-types (1.16) 
  Using polyglot (0.3.1) 
  Using treetop (1.4.9) 
  Using mail (2.2.17) 
  Using actionmailer (3.0.5) 
  Using arel (2.0.9) 
  Using activerecord (3.0.5) 
  Using activeresource (3.0.5) 
  Using archive-tar-minitar (0.5.2) 
  Using authlogic (2.1.6) 
  Using xml-simple (1.0.15) 
  Using aws-s3 (0.6.2) 
  Using bcrypt-ruby (2.1.4) 
  Using block_helpers (0.3.3) 
  Using bundler (1.0.10) 
  Using columnize (0.3.2) 
  Using diff-lcs (1.1.2) 
  Using json (1.5.1) 
  Using gherkin (2.3.6) 
  Using term-ansicolor (1.0.5) 
  Using cucumber (0.10.2) 
  Using nokogiri (1.4.4) 
  Using cucumber-rails (0.4.1) 
  Using daemons (1.0.10) 
  Using database_cleaner (0.6.7) 
  Using factory_girl (1.3.3) 
  Using faker (0.9.5) 
  Using fastercsv (1.5.4) 
  Using formtastic (1.2.3) 
  Using gem_plugin (0.2.3) 
  Using haml (3.0.25) 
  Using hoe (2.9.4) 
  Using thor (0.14.6) 
  Using railties (3.0.5) 
  Using rails (3.0.5) 
  Using kaminari (0.12.0) 
  Using ruby_core_source (0.1.5) 
  Using linecache19 (0.5.12) 
  Using meta_search (1.0.4) 
  Using mongrel (1.2.0.pre2) 
  Using paperclip (2.3.11) 
  Using pg (0.11.0) 
  Using pickle (0.4.7) 
  Using populator (1.0.0) 
  Using render_inheritable (1.0.0) 
  Using rspec-core (2.5.1) 
  Using rspec-expectations (2.5.0) 
  Using rspec-mocks (2.5.0) 
  Using rspec (2.5.0) 
  Using rspec-rails (2.5.0) 
  Using ruby-debug-base19 (0.11.25) 
  Using ruby-debug19 (0.11.6) 
  Using test-unit (1.2.3) 
  Using will_paginate (3.0.pre2) 
  Using typus (3.0.10) from https://github.com/fesplugas/typus.git (at master) 
  Using webrat (0.7.3)
  </code></pre>
  
  <p>UPDATE:</p>
  
  <p><code>heroku stack</code></p>
  
  <pre><code>aspen-mri-1.8.6
  * bamboo-ree-1.8.7
  bamboo-mri-1.9.2 (prepared, will migrate on next git push)
  </code></pre>
  
  <p>UPDATE2:</p>
  
  <p>error trace</p>
  
  <pre><code>Installing hoe (2.9.4) /usr/ruby1.9.2/lib/ruby/1.9.1/rubygems/installer.rb:170:in `install': hoe requires RubyGems version &gt;= 1.4. Try 'gem update --system' to update RubyGems itself. (Gem::InstallError)
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/source.rb:95:in `install'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/installer.rb:55:in `block in run'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/spec_set.rb:12:in `block in each'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/spec_set.rb:12:in `each'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/spec_set.rb:12:in `each'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/installer.rb:44:in `run'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/installer.rb:8:in `install'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/cli.rb:225:in `install'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/vendor/thor/task.rb:22:in `run'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/vendor/thor.rb:246:in `dispatch'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/vendor/thor/base.rb:389:in `start'
      from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/bin/bundle:13:in `&lt;top (required)&gt;'
      from /usr/ruby1.9.2/bin/bundle:19:in `load'
      from /usr/ruby1.9.2/bin/bundle:19:in `&lt;main&gt;'
     FAILED: http://devcenter.heroku.com/articles/bundler
  !Heroku push rejected, failed to install gems via Bundler
  </code></pre>