diff --git a/configs/services/zammad.nix b/configs/services/zammad.nix
index 593de57..08d753a 100644
--- a/configs/services/zammad.nix
+++ b/configs/services/zammad.nix
@@ -21,4 +21,9 @@
     config.services.zammad.port
     config.services.zammad.websocketPort
   ];
+
+  environment.systemPackages = with pkgs; [
+    # for pgp support
+    gnupg
+  ];
 }