diff --git a/docker/Keystone/Dockerfile b/docker/Keystone/Dockerfile
index 8525cb5..c3ab344 100644
--- a/docker/Keystone/Dockerfile
+++ b/docker/Keystone/Dockerfile
@@ -63,6 +63,8 @@
 # ENV LDAP_URL                            ldap://localhost
 # ENV LDAP_BIND_USER                      no default
 # ENV LDAP_BIND_PASSWORD                  no default
+# ENV LDAP_CHASE_REFERRALS                no default
+# ENV LDAP_PAGE_SIZE                      0
 # ENV LDAP_USER_TREE_DN                   no default
 # ENV LDAP_USER_OBJECTCLASS               inetOrgPerson
 # ENV LDAP_USER_ID_ATTRIBUTE              cn
@@ -73,6 +75,8 @@
 # ENV LDAP_USER_ENABLED_MASK              0
 # ENV LDAP_USER_ENABLED_DEFAULT           true
 # ENV LDAP_USER_ENABLED_INVERT            false
+# ENV LDAP_GROUP_OBJECTCLASS              groupOfNames
+# ENV LDAP_GROUP_TREE_DN                  no default
 # ENV LDAP_USE_STARTTLS                   false
 # ENV LDAP_TLS_CACERT_BASE64              no default
 # ENV LDAP_TLS_REQ_CERT                   demand