diff --git a/.env.sample b/.env.sample
index f89c403..03e33d4 100644
--- a/.env.sample
+++ b/.env.sample
@@ -1,5 +1,6 @@
 TYPE=matrix-synapse
 DOMAIN=matrix-synapse.example.com
+# SERVER_NAME=example.com
 TIMEOUT=300
 ENABLE_AUTO_UPDATE=true
 LETS_ENCRYPT_ENV=production