diff --git a/hosts/yodaTux/configuration.nix b/hosts/yodaTux/configuration.nix
index eea5d7a..f4f6d9c 100644
--- a/hosts/yodaTux/configuration.nix
+++ b/hosts/yodaTux/configuration.nix
@@ -26,6 +26,7 @@
 
       ../../modules/programs.nix
       ../../modules/spaceFM.nix
+      ../../modules/ausweisapp.nix
       ../../modules/nextcloud-integration.nix
       ../../modules/syncthing.nix
       ../../modules/signal-desktop.nix
diff --git a/modules/ausweisapp.nix b/modules/ausweisapp.nix
new file mode 100644
index 0000000..f88dee5
--- /dev/null
+++ b/modules/ausweisapp.nix
@@ -0,0 +1,7 @@
+{ config, pkgs, ... }:
+{
+  # Enable AusweisApp.
+  programs.ausweisapp.enable = true;
+  # Open firewall ports for the Smartphone as Card Reader (SaC).
+  programs.ausweisapp.openFirewall = true;
+}