How to keep changes made on sqlite database

I have a Django app with a SQLite database. This app is deployed on Heroku.

When someone uses the app and add data into the database, the sqlite database is modified. But when I make a code change on Github and then deploy this new version of my app, I also deploy the sqlite database (which doesn't have the new changes made by the users) and so I remove the changes.

What is the best process to prevent this ?