diff --git a/Configuration.md b/Configuration.md
index 3502840..8c9efab 100644
--- a/Configuration.md
+++ b/Configuration.md
@@ -41,6 +41,8 @@ If you wanna use want to revert changes or view older revisions of entities, the
 * `ERROR_PAGE_SHOW_HELP`: Set this 0, to disable the solution hints shown on an error page. These hints should not contain senstive informations, but could confuse end-users.
 
 ### Other / less used options
+* `TRUSTED_PROXIES`: Set the IP addresses (or IP blocks) of trusted reverse proxies here. This is needed to get correct IP informations (see [here](https://symfony.com/doc/current/deployment/proxies.html) for more info).
+* `TRUSTED_HOSTS`: To prevent `HTTP Host header attacks` you can set a regex containing all host names via which Part-DB should be accessible. If accessed via the wrong hostname, an error will be shown.
 * `DEMO_MODE`: Set Part-DB into demo mode, which forbids users to change their passwords and settings. Used for the demo instance, should not be needed for normal installations.
 * `NO_URL_REWRITE_AVAILABLE` (allowed values `true` or `false`): Set this value to true, if your webserver does not support rewrite. In this case, all URL pathes will contain index.php/, which is needed then. Normally this setting do not need to be changed.
 * `FIXER_API_KEY`: If you want to automatically retrieve exchange rates for base currencies other than euros, you have configure an exchange rate provider API. [Fixer.io](https://fixer.io/) is preconfigured, and you just have to register there and set the retrieved API key in this environment variable.