diff --git a/redmine.subdomain.conf.sample b/redmine.subdomain.conf.sample
index e96a0d6..a28fd2b 100644
--- a/redmine.subdomain.conf.sample
+++ b/redmine.subdomain.conf.sample
@@ -1,3 +1,5 @@
+## Version 2025/05/04
+
 server {
     listen 443 ssl;
     listen [::]:443 ssl;