diff --git a/guacamole/README.md b/guacamole/README.md
index 0886c9c21..200961a6e 100644
--- a/guacamole/README.md
+++ b/guacamole/README.md
@@ -20,7 +20,7 @@ _Thanks to everyone having starred my repo! To star it click on the image below,
 
 [Apache Guacamole](https://guacamole.apache.org/) is a clientless remote desktop gateway. It supports standard protocols like VNC, RDP, and SSH. This container is only the backend server component needed to use The official or 3rd party HTML5 frontends.
 
-This addon is based on the docker image https://github.com/abesnier/docker-guacamole
+This addon is based on the docker image https://github.com/maxwaldorf/guacamole
 
 ## Configuration
 
@@ -28,6 +28,14 @@ Webui can be found at <http://your-ip:8080>.
 
 The default username is guacadmin with password guacadmin.
 
+Addons options :
+```yaml
+EXTENSIONS: auth-totp # see https://github.com/maxwaldorf/guacamole#enabling-extensions
+GUID: user # https://docs.linuxserver.io/general/understanding-puid-and-pgid
+GPID: user # https://docs.linuxserver.io/general/understanding-puid-and-pgid
+TZ: Europe/Paris # Sets a specific timezone
+```
+
 ## Installation
 
 The installation of this add-on is pretty straightforward and not different in comparison to installing any other add-on.