With every upgrade, make sure to re-publish Chatify's assets:
php artisan verndor:publish --tag=chatify-views --force
php artisan verndor:publish --tag=chatify-assets --force
If needed, you can re-publish the other assets the same way above by just replacing the name of the asset (chatify-NAME).
To re-publish only views & assets:
php artisan chatify:publish
To re-publish all the assets (views, assets, config..):
php artisan chatify:publish --force
This will overwrite all the assets, so all your changes will be overwritten.