diff --git a/.env.sample b/.env.sample
index f868865..2d93e77 100644
--- a/.env.sample
+++ b/.env.sample
@@ -1,6 +1,6 @@
 TYPE=custom-php
 
-DOMAIN=example.com
+DOMAIN=custom-php.example.com
 ## Domain aliases
 #EXTRA_DOMAINS=', `www.example.com`'
 LETS_ENCRYPT_ENV=production