diff --git a/synapse.subdomain.conf.sample b/synapse.subdomain.conf.sample
index e3a1e99..6c5d5b2 100644
--- a/synapse.subdomain.conf.sample
+++ b/synapse.subdomain.conf.sample
@@ -1,3 +1,5 @@
+## Version 2021/10/02
+
 server {
     listen 443 ssl;
     listen [::]:443 ssl;
@@ -41,4 +43,4 @@ server {
         proxy_set_header X-Forwarded-Proto $scheme;
         proxy_set_header Host $host;
     }
-}
\ No newline at end of file
+}