diff --git a/README.md b/README.md
index e2b3c48..e715fdd 100644
--- a/README.md
+++ b/README.md
@@ -76,8 +76,8 @@ services:
       TZ: 'Europe/London'
       # Set a password to access the web interface. Not setting one will result in a random password being assigned
       FTLCONF_webserver_api_password: 'correct horse battery staple'
-      # If using Docker's default `bridge` network setting the dns listening mode should be set to 'all'
-      FTLCONF_dns_listeningMode: 'all'
+      # If using Docker's default `bridge` network setting the dns listening mode should be set to 'ALL'
+      FTLCONF_dns_listeningMode: 'ALL'
     # Volumes store your data between container upgrades
     volumes:
       # For persisting Pi-hole's databases and common configuration file