diff --git a/docs/setup-guide.rst b/docs/setup-guide.rst
index e9f4a87..e45525a 100644
--- a/docs/setup-guide.rst
+++ b/docs/setup-guide.rst
@@ -72,7 +72,7 @@ common ones.
 
      mailserver = {
        enable = true;
-       stateVersion = 1;
+       stateVersion = 2;
        fqdn = "mail.example.com";
        domains = [ "example.com" ];