diff --git a/hosts/ksios/configuration.nix b/hosts/ksios/configuration.nix
index a91e24c..37503ad 100644
--- a/hosts/ksios/configuration.nix
+++ b/hosts/ksios/configuration.nix
@@ -174,7 +174,7 @@
     };
 
     certificateScheme = "acme";
-    acmeCertificateName = "itepastra.nl";
+    acmeCertificateName = "mail.itepastra.nl";
   };
 
   security.acme = {