Unable to push heroku master

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i'm currently on section 1.4.2 of Mike Hartl's rails tutorial. When i try to push my project up to Heroku i get the following error:

Could not find i18n-0.6.10 in any of the sources
 !
 !     Failed to install gems via Bundler.
 !

 !     Push rejected, failed to compile Ruby app

To git@heroku.com:agile-badlands-7756.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:agile-badlands-7756.git'

Here are the contents of my Gemfile:

source 'https://rubygems.org'
ruby '2.1.0'
#ruby-gemset=railstutorial_rails_4_0

gem 'rails', '4.0.5'

group :development do
  gem 'sqlite3', '1.3.8'
end

gem 'sass-rails', '4.0.1'
gem 'uglifier', '2.1.1'
gem 'coffee-rails', '4.0.1'
gem 'jquery-rails', '3.0.4'
gem 'turbolinks', '1.1.1'
gem 'jbuilder', '1.0.2'

group :doc do
  gem 'sdoc', '0.3.20', require: false
end

group :production do
  gem 'pg', '0.15.1'
  gem 'rails_12factor', '0.0.2'
end

Any ideas? This is my first post on stack so let me know if i need to add anything else! Thanks in advance for any help.

asked 23 secs ago

user3685076

1