diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 50b4b7c..6a94b94 100755
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -87,12 +87,8 @@ in
     };
     # only generate for static site
     certs = {
-      "nimh.roypository.com" = {
-        domain = "nimh.roypository.com";
-        group = "nginx";
-      };
-      "imgs.roypository.com" = {
-        domain = "imgs.roypository.com";
+      "roypository.com" = {
+        domain = "*.roypository.com";
         group = "nginx";
       };
     };
@@ -107,7 +103,7 @@ in
 
     virtualHosts."nimh.roypository.com" = {
       forceSSL = true;
-      useACMEHost = "nimh.roypository.com";
+      useACMEHost = "roypository.com";
 
       locations."/" = {
         root = nimhStaticSite;