diff --git a/systems/hetzner/mail.nix b/systems/hetzner/mail.nix
index 6e74d00..caa72aa 100644
--- a/systems/hetzner/mail.nix
+++ b/systems/hetzner/mail.nix
@@ -8,6 +8,7 @@
 {
   mailserver = {
     enable = true;
+    stateVersion = 1;
     fqdn = "mail.missing.ninja";
     domains = [
       "missing.ninja"