diff --git a/nginx/add_servers.py b/nginx/add_servers.py
index 0a19afe..b725ea4 100644
--- a/nginx/add_servers.py
+++ b/nginx/add_servers.py
@@ -126,7 +126,7 @@ def main() -> None:
                     ),
                     proxy_pass=params.get("proxy_pass"),
                     certificate_dir=_get_certificate_path(
-                        args.http_only, domains_with_certs, args.certificates_path, server_name
+                        args.http_only, domains_with_certs, args.certificates_path, params.get("certificate_name") or server_name
                     ),
                     port=params.get("port"),
                     ssl_port=params.get("ssl_port"),
diff --git a/nginx/servers.yaml.example b/nginx/servers.yaml.example
index f846659..0c3dc4b 100644
--- a/nginx/servers.yaml.example
+++ b/nginx/servers.yaml.example
@@ -17,6 +17,7 @@ servers:
       - "proxy_read_timeout 86400;"
   "*.doma.in":
     all_names: "*.doma.in doma.in"
+    certificate_name: doma.in
     proxy_pass: "http://full.subdomain.proxy"
     server_options:
       - "proxy_buffering off;"
diff --git a/run_once.d-c.yml b/run_once.d-c.yml
index d68047c..410a00f 100644
--- a/run_once.d-c.yml
+++ b/run_once.d-c.yml
@@ -1,4 +1,4 @@
-version: '3.4'
+name: run_once
 
 services:
   certbot: