diff --git a/Configuration.md b/Configuration.md
index ec1df08..c3d0cb6 100644
--- a/Configuration.md
+++ b/Configuration.md
@@ -41,4 +41,14 @@ These settings are also relevant:
 * `MAX_PAGE_SIZE`: Use the recommended default of 1000.
 * `SUPERUSER_*`: Only define those variables during the initial setup, and drop them once the DB is set up. Don't use the default passwords!
 * `SKIP_SUPERUSER`: Set to any value after you've created the superuser.
-* `REDIS_*`: Use your own persistent redis. Don't use the default passwords!
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+* `REDIS_*`: Use your own persistent redis. Don't use the default passwords!
+
+## Custom Configuration Files
+
+You can create you own configuration files if you need to configure something that can't be configured via the environment variables.
+See the `configuration/extra.py` file as an example.
+This works for regular configuration as well as for ldap configuration files, with the little (obvious?) difference that ldap configuration files are placed in `configuration/ldap/`.
+
+The files are read in the order in which they are received from the system, which usually is alphabetical order.
+Later files take precedence over previous files.
+All custom files take precedence over the default configuration files `configuration.py` and `ldap_config.py`.
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