diff --git a/.env.sample b/.env.sample
index d0f34ef..92120b8 100644
--- a/.env.sample
+++ b/.env.sample
@@ -1,5 +1,5 @@
 TYPE=matrix-synapse
-DOMAIN=matrix.example.com
+DOMAIN=matrix-synapse.example.com
 TIMEOUT=300
 ENABLE_AUTO_UPDATE=true
 LETS_ENCRYPT_ENV=production