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Using the Heroku toolbelt you can write in the command line:
Code Block language text $ heroku plugins:install https://github.com/heroku/heroku-deploy
Check if the heroku-deploy plugin is installed by typing in the command line
Code Block language bash $ heroku plugins
And if everything is ok you will see:
Code Block language bash === Installed Plugins heroku-deploy
Creating a Heroku application
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