diff --git a/hosts/suwako/mailserver.nix b/hosts/suwako/mailserver.nix
index 94aa2ee..3033811 100644
--- a/hosts/suwako/mailserver.nix
+++ b/hosts/suwako/mailserver.nix
@@ -9,7 +9,7 @@
     in
     rec {
       enable = true;
-      stateVersion = 1;
+      stateVersion = 3;
       fqdn = "mail.${domain}";
       sendingFqdn = fqdn;
       domains = [ domain ];