diff --git a/templates/etc/openldap/slapd.conf.j2 b/templates/etc/openldap/slapd.conf.j2
index 79350eb..e3c701f 100644
--- a/templates/etc/openldap/slapd.conf.j2
+++ b/templates/etc/openldap/slapd.conf.j2
@@ -19,6 +19,7 @@ modulepath              /usr/lib64/openldap/
 modulepath              /usr/lib64/openldap
 moduleload              back_ldap
 moduleload              rwm
+moduleload              memberof.la
 
 # Main settings ###############################################################
 pidfile                 /var/run/openldap/slapd.pid
@@ -40,6 +41,8 @@ rebind-as-user
 uri                     "{{ ldap_proxy_server }}"
 suffix                  "{{ ldap_proxy_server_suffix }}"
 
+overlay                 memberof
+
 ### ACL definition ############################################################
 include                 "{{ ldap_proxy_acl_file }}"