diff --git a/modules/ausweisapp.nix b/modules/ausweisapp.nix
new file mode 100644
index 0000000..bca9aa1
--- /dev/null
+++ b/modules/ausweisapp.nix
@@ -0,0 +1,10 @@
+{ config, lib, pkgs, ... }:
+
+lib.mkIf config.sbruder.gui.enable {
+  environment.systemPackages = with pkgs; [
+    AusweisApp2
+  ];
+
+  # required for SaC (smartphone as cardreader)
+  networking.firewall.allowedUDPPorts = [ 24727 ];
+}
diff --git a/modules/default.nix b/modules/default.nix
index 20389d3..16c2c0e 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -19,6 +19,7 @@
   # configuration options
   imports = [
     ../pkgs/modules.nix
+    ./ausweisapp.nix
     ./cups.nix
     ./docker.nix
     ./fonts.nix