diff --git a/docs/SETUP_PROD.md b/docs/SETUP_PROD.md
index 2be18d1..b7233fa 100644
--- a/docs/SETUP_PROD.md
+++ b/docs/SETUP_PROD.md
@@ -82,7 +82,7 @@ COOKIE_SECURE=true
 LISTEN_ADDRESS=0.0.0.0:443
 ADMIN_USERNAME=admin
 ADMIN_PASSWORD=FIXME
-HOSTNAME=central
+HOSTNAME=central.local
 STORAGE=/home/central/storage
 FRONIUS_ORIG=http://10.0.0.10
 ```