diff --git a/docker-compose.yaml b/docker-compose.yaml
index bb39eaa..de578d3 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -66,7 +66,7 @@ services:
       - CMD_DOMAIN=sf-hedgedoc.psi.ch
       - CMD_URL_ADDPORT=false
       - CMD_PROTOCOL_USESSL=true
-      - CMD_LDAP_URL=dc00.psi.ch
+      - CMD_LDAP_URL=ldaps://dc00.d.psi.ch
       - CMD_LDAP_BINDDN={{ bind_user }}
       - CMD_LDAP_BINDCREDENTIALS={{ bind_pw }}
       - CMD_LDAP_SEARCHBASE=OU=users,OU=psi,DC=d,DC=psi,DC=ch