diff --git a/README.md b/README.md
index f6521c2..2bbf960 100644
--- a/README.md
+++ b/README.md
@@ -97,6 +97,7 @@ Edit [docker-compose.treafik.yml](docker-compose.traefik.yml) or [docker-compose
 ```
 LDAP_SERVER: ldaps://LDAPSERVER:636
 LDAP_BASE: dc=DOMAIN,dc=TLD
+LDAP_SERVER_CACERT: /etc/ssl/certs/LDAPCERT
 # If LDAP_BINDDN is set, the ldap bind happens directly by using the provided DN
 # All occurrences of `%u` get replaced by the entered uid.
 # All occurrences of `%m`get replaced by the entered mail.