Heroku push rejected: can't find jquery-rails-2.0.0 in sources

I'm trying to push an Enki gem blog to Heroku and I'm getting an error

Could not find jquery-rails-2.0.0 in any of the sources

However, in the Gemfile I had

`gem 'jquery-rails'`

and I've never had a problem pushing an Enki blog with this setup before. Here's the full error message

 Running: bundle install --without development:test --path vendor/bundle --binstubs bin/ --deployment
           Fetching gem metadata from https://rubygems.org/.......
           Could not find jquery-rails-2.0.0 in any of the sources
     !
     !     Failed to install gems via Bundler.
     !
     !     Heroku push rejected, failed to compile Ruby/rails app

After I got the error message I added this to the gemfile

gem 'jquery-rails-2.0.0'

I got this error message

Could not find gem 'jquery-rails-2.0.0 (>= 0) java' in the gems available on this machine.

I then tried to do

gem install jquery-rails

It gave me

  Successfully installed jquery-rails-2.0.2
1 gem installed
Installing ri documentation for jquery-rails-2.0.2...
Installing RDoc documentation for jquery-rails-2.0.2...

But the push didn't work, same error

   -----> Heroku receiving push
-----> Ruby/Rails app detected
-----> Installing dependencies using Bundler version 1.2.0.rc
       Running: bundle install --without development:test --path vendor/bundle --binstubs bin/ --deployment
       Fetching gem metadata from https://rubygems.org/.......
       Could not find jquery-rails-2.0.0 in any of the sources
 !
 !     Failed to install gems via Bundler.
 !
 !     Heroku push rejected, failed to compile Ruby/rails app

this is the gemfile

source 'https://rubygems.org'

gem 'rails', '3.2.6'
gem 'heroku'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'

  gem 'uglifier', '>= 1.0.3'
end

group :development, :test do
  gem 'sqlite3'
end
group :production do
  gem 'pg'
end

group :production do
  gem 'thin'
end
platforms :jruby do
  gem 'activerecord-jdbcsqlite3-adapter'
  gem 'trinidad'
  gem 'jruby-openssl'
end

gem 'jquery-rails'
#gem 'jquery-rails-2.0.0'

# Use unicorn as the web server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano'

# To use debugger
# gem 'ruby-debug'

# Bundle the extra gems:
gem 'RedCloth', '~> 4.2.9', :require => 'redcloth'
gem 'ruby-openid', :require => 'openid'
gem 'rack-openid', :require => 'rack/openid'
gem 'aaronh-chronic', :require => 'chronic' # Fixes for 1.9.2
gem 'coderay'
gem 'lesstile'
gem 'formtastic'
gem 'will_paginate', '~> 3.0.2'
gem 'exception_notification', '~> 2.5.2'
gem 'open_id_authentication'

# Bundle gems for the local environment. Make sure to
# put test-only gems in this group so their generators
# and rake tasks are available in development mode:
group :test do
  gem 'database_cleaner'
  gem 'cucumber-rails',    :require => false
  gem 'cucumber-websteps', :require => false
  gem 'factory_girl'
  gem 'rspec'
  gem 'nokogiri', '~> 1.5.0'
  gem 'webrat'
end

group :development, :test do
  gem 'rspec-rails'
end