# PostgreSQL DB Sync
DB Sync is a tool that takes care of two-way synchronisation between Mergin Maps and PostGIS databases. The synchronisation works both ways: changes made in a PostGIS database are automatically pushed to a configured Mergin Maps project and changes made in a GeoPackage in the Mergin Maps project are pushed to the PostGIS database.
Interested in using DB Sync? Go to MerginMaps/mergin-db-sync (opens new window) repository for the source code and more details. Here, you will also find the Quick start guide that will show you how to set up one way synchronisation between your PostGIS database and a new Mergin Maps project.