title: Heroku push rejected, Ruby Version Changed Detected, Could not find net-scp-1.0.6
body: <p>I can't figure out what is going on here. I deployed to Heroku on Tuesday with no problem. I have not changed my Ruby version locally or on the Gemfile but heroku is telling me that I have changed Ruby Versions &amp; it's unable to find net-scp-1.0.6. Everything works perfectly locally, I have search around and can't find anything addressing a similar problem.</p>
  
  <pre><code>Counting objects: 81, done.
  Delta compression using up to 4 threads.
  Compressing objects: 100% (62/62), done.
  Writing objects: 100% (62/62), 10.77 KiB, done.
  Total 62 (delta 49), reused 0 (delta 0)
  -----&gt; Deleting 8 files matching .slugignore patterns.
  -----&gt; Removing .DS_Store files
  -----&gt; Ruby/Rails app detected
  -----&gt; Using Ruby version: ruby-1.9.3
  -----&gt; Installing dependencies using Bundler version 1.3.0.pre.5
         Ruby version change detected. Clearing bundler cache.
         Old: ruby 1.9.3p327 (2012-11-10 revision 37606) [x86_64-linux]
         New: ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-linux]
         Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin --deployment
         Fetching gem metadata from https://rubygems.org/.......
         Fetching gem metadata from https://rubygems.org/..
         Could not find net-scp-1.0.6 in any of the sources
   !
   !     Failed to install gems via Bundler.
   !
   !     Heroku push rejected, failed to compile Ruby/rails app
  </code></pre>
  
  <p>This is what my Gemfile looks like.</p>
  
  <pre><code>source 'https://rubygems.org'
  
  ruby '1.9.3'
  
  gem 'rails', '~&gt; 3.2.11'
  
  gem 'aws-sdk'
  gem 'jquery-rails'
  gem 'jquery-ui-rails'
  
  gem 'pg'
  gem 'thin'
  gem 'best_in_place'
  gem 'stripe'
  gem 'paperclip'
  gem 'coffeebeans'
  gem 'mail'
  gem 'bcrypt-ruby', '~&gt; 3.0.0'
  gem 'carmen'
  gem 'haml'
  gem 'devise'
  gem 'sinatra', '~&gt; 1.3.2'
  gem 'dynamic_form'
  gem 'fog', '~&gt; 1.3.1'
  gem 'wicked'
  gem 'lazy_high_charts', '~&gt; 1.1.5'
  gem 'jquery-datatables-rails'
  gem 'sass-rails'
  
  group :assets do
    gem 'uglifier', '&gt;= 1.0.3'
    gem 'coffee-rails', '~&gt; 3.2.1'
  end
  
  group :test, :development do
    gem 'hirb'
  end
  </code></pre>
  
  <p>Any ideas would be appreciated. Thanks.</p>