Error running Heroku bundle

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I just updated my Gemfile and upgraded to rails 4.0.0 and ruby 2.0.0. I ran bundle install, bundle update, then pushed to Heroku. Then I migrated the db.

The app works on localhost but shows an application error on Heroku.

So I ran heroku run bundle update, which gave the following error:

You are trying to install in deployment mode after changing
your Gemfile. Run `bundle install` elsewhere and add the
updated Gemfile.lock to version control.

If this is a development machine, remove the Gemfile freeze 
by running `bundle install --no-deployment`.

    You have added to the Gemfile:
    * source: http://ift.tt/Jy5rxk (at master)
    * source: rubygems repository https://rubygems.org/
* rails (= 4.0.0)
* sass-rails (~> 4.0.0)
* uglifier (>= 1.3.0)
* coffee-rails (~> 4.0.0)
* jquery-rails
* turbolinks
* jbuilder (~> 1.2)
* sorcery
* thin
* pg
* rails_12factor
* sdoc
* mailcatcher
* rspec-rails
* sqlite3
* foreman
* quiet_assets


You have changed in the Gemfile:
* sorcery from `http://ift.tt/Jy5rxk (at master)` to `no specified source`

This is what my .gitignore file looks like:

# See http://ift.tt/Vpfznc for more about ignoring files.
#
# If you find yourself ignoring temporary files generated by your text editor
# or operating system, you probably want to add a global ignore instead:
#   git config --global core.excludesfile ~/.gitignore_global

# Ignore bundler config
.bundle

# Ignore the default SQLite database.
db/*.sqlite3
db/*.sqlite3-journal
db/development.sqlite3

# Ignore all logfiles and tempfiles.
log/*.log
tmp

.DS_Store
.sass-cache

.ruby-version
Procfile
.rspec

asked 34 secs ago

colmtuite

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