diff --git a/ssh/DOCS.md b/ssh/DOCS.md
index f7bfc62..aa057ea 100644
--- a/ssh/DOCS.md
+++ b/ssh/DOCS.md
@@ -50,10 +50,15 @@ Add-on configuration:
 authorized_keys:
   - "ssh-rsa AKDJD3839...== my-key"
 password: ''
+apks: []
 server:
   tcp_forwarding: false
 ```
 
+### Option: `apks`
+
+Additional software packages to install in the add-on container.
+
 ### Option: `authorized_keys`
 
 Your **public keys** that you wish to accept for login. You can authorize multiple keys by adding multiple public keys to the list.