diff --git a/docs/images/docker-ddclient.md b/docs/images/docker-ddclient.md
index 8b99855de..c0bab3bb4 100644
--- a/docs/images/docker-ddclient.md
+++ b/docs/images/docker-ddclient.md
@@ -56,6 +56,10 @@ This image can be run with a read-only container filesystem. For details please
 
 To help you get started creating a container from this image you can either use docker-compose or the docker cli.
 
+!!! info
+
+    Unless a parameter is flaged as 'optional', it is *mandatory* and a value must be provided.
+
 ### docker-compose (recommended, [click here for more info](https://docs.linuxserver.io/general/docker-compose))
 
 ```yaml
@@ -113,6 +117,7 @@ Containers are configured using parameters passed at runtime (such as those abov
 
 | Parameter | Function |
 | :-----:   | --- |
+| `--read-only=true` | Run container with a read-only filesystem. Please [read the docs](https://docs.linuxserver.io/misc/read-only/). |
 
 ## Environment variables from files (Docker secrets)