diff --git a/README.md b/README.md
index 5f85708..2010118 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,7 @@ services:
           hard: "65536"
     ports:
         - "631:631"
+        - "5353:5353/udp"
     environment:
         - USERNAME=admin
         - PASSWORD=cups