diff --git a/README.md b/README.md
index 2231b24..670b62c 100644
--- a/README.md
+++ b/README.md
@@ -122,6 +122,7 @@ php artisan db:seed --class=ExampleRecipesSeeder
 | `REGISTRATION_ENABLED`        | Allow user registration via Webinterface                                                                                                    | 1                 |
 | `SSL_MODE`                    | SSL Mode, if not using a Reverse Proxy ([docs](https://serversideup.net/open-source/docker-php/docs/customizing-the-image/configuring-ssl)) | `off`             |
 | `FORCE_HTTPS`                 | If your server handles SSL termination, enforce HTTPS.                                                                                      | 0                 |
+| `TRUSTED_PROXIES`             | If your server handles SSL termination, allow mixed mode. e.g. `"172.0.0.0/8"` or `*`                                                       | null              |
 | `PHP_OPCACHE_ENABLE`          | Enable PHP Opcache                                                                                                                          | 0                 |
 | `TRMNL_IMAGE_URL_TIMEOUT`     | How long TRMNL waits for a response on the display endpoint. (sec)                                                                          | 30                |
 | `APP_TIMEZONE`                | Default timezone, which will be used by the PHP date functions                                                                              | UTC               |