diff --git a/flake.nix b/flake.nix
index a3c47cd..8db58b9 100755
--- a/flake.nix
+++ b/flake.nix
@@ -35,6 +35,7 @@
             ./modules/nginx.nix
             ./modules/userdir.nix
             ./modules/hedgedoc.nix
+            ./modules/postgres.nix
             ./modules/wiki.nix
             ./modules/ftp.nix
             ./modules/stream.nix
diff --git a/modules/postgres.nix b/modules/postgres.nix
new file mode 100644
index 0000000..ad39890
--- /dev/null
+++ b/modules/postgres.nix
@@ -0,0 +1,8 @@
+{ ... }:
+{
+  # automatically back up all databases
+  services.postgresqlBackup = {
+    enable = true;
+    location = "/var/lib/backup/postgresql";
+  };
+}