diff --git a/nix/module.nix b/nix/module.nix
index 123ef04..17ae283 100644
--- a/nix/module.nix
+++ b/nix/module.nix
@@ -173,6 +173,11 @@ in
     security.acme = {
       acceptTerms = true;
       defaults.email = "thilo.hohlt@tutanota.com";
+      certs."demo.archtika.com" = {
+        domain = "*.demo.archtika.com";
+        extraDomainNames = ["demo.archtika.com"];
+        dnsProvider = "porkbun";
+      };
     };
   };
 }