I assume you deployed parse-server to Heroku simply by using the Deploy button on the Heroku website. If so you can manually fetch the changes of parse-server-example from the original repository onto you computer and push them back to heroku.
- Clone the current deployment of parse-server from Heroku to your computer
- Add the original parse-server-example as a remote repository from
https://github.com/ParsePlatform/parse-server-example.git
- Fetch the changes from the remote repository that you've added
- Merge
- Push to heroku
Note:
Parse Server is currently at 2.2.9. If you have a live app it would be recommendable to test if your app still works after the update in a test environment prior to the production environment .