diff --git a/modules/webstack.nix b/modules/webstack.nix
index f05aaa6..770391a 100644
--- a/modules/webstack.nix
+++ b/modules/webstack.nix
@@ -182,16 +182,9 @@
       webroot = "/var/lib/acme/acme-challenge";
       ocspMustStaple = true;
     };
-    certs."coolneng.duckdns.org".extraDomainNames = [
-      "radicale.coolneng.duckdns.org"
-      "sync.coolneng.duckdns.org"
-      "git.coolneng.duckdns.org"
-      "rss.coolneng.duckdns.org"
-      "matrix.coolneng.duckdns.org"
-      "element.coolneng.duckdns.org"
-      "wallabag.coolneng.duckdns.org"
-      "books.coolneng.duckdns.org"
-    ];
+    certs."coolneng.duckdns.org".extraDomainNames =
+      lib.attrsets.mapAttrsToList (name: value: "${name}")
+      config.services.nginx.virtualHosts;
   };
 
   # Generate dhparams