diff --git a/docs/images/docker-calibre.md b/docs/images/docker-calibre.md
index 0c3324dc6..d2b9f3a53 100644
--- a/docs/images/docker-calibre.md
+++ b/docs/images/docker-calibre.md
@@ -180,6 +180,10 @@ It is possible to install extra packages during container start using [universal
 
 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
@@ -232,9 +236,9 @@ Containers are configured using parameters passed at runtime (such as those abov
 
 | Parameter | Function |
 | :----: | --- |
-| `8080` | Calibre desktop gui. |
-| `8181` | Calibre desktop gui HTTPS. |
-| `8081` | Calibre webserver gui. |
+| `8080:8080` | Calibre desktop gui. |
+| `8181:8181` | Calibre desktop gui HTTPS. |
+| `8081:8081` | Calibre webserver gui. |
 
 ### Environment Variables (`-e`)