diff --git a/README.md b/README.md
index e2b1ab5d..0e57ebe5 100644
--- a/README.md
+++ b/README.md
@@ -92,6 +92,8 @@ You can access advanced features of the Guacamole remote desktop using ctrl+alt+
 
 **The KDE and i3 flavors for Ubuntu need to be run in privileged mode to function properly**
 
+**If using a reverse proxy with a subfolder please use the `SUBFOLDER` environment variable to define it's name, IE `-e SUBFOLDER="/subfolder/"`**
+
 If you ever lose your password you can always reset it by execing into the container as root:
 ```
 docker exec -it webtop passwd abc
diff --git a/readme-vars.yml b/readme-vars.yml
index b0f13bf5..093da3b3 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -65,6 +65,8 @@ app_setup_block: |
   **Unlike our other containers these Desktops are not designed to be upgraded by Docker, you will keep your home directoy but anything you installed system level will be lost if you upgrade an existing container. To keep packages up to date instead use Ubuntu's own apt program or Alpine's apk program**
 
   **The KDE and i3 flavors for Ubuntu need to be run in privileged mode to function properly**
+
+  **If using a reverse proxy with a subfolder please use the `SUBFOLDER` environment variable to define it's name, IE `-e SUBFOLDER="/subfolder/"`**
   
   If you ever lose your password you can always reset it by execing into the container as root:
   ```