Ghost has currently rolled out its newer V4 publicly. The newer version of Ghost comes with fancy and new powerful features. After the launch of v4, many users who are using v3 on Heroku are in great trouble and don't know that how to trouble this problem and update to the latest version 4.
Well, the problem has been solved with the brand new
ghost-v4-on-heroku repo. Anyone can deploy the latest ghost v4 on Heroku by simply clicking on a button.
You can visit any of the links to deploy Ghost version 4 on Heroku or you can update your pre-deployed Ghost version 3 to version 4.