diff --git a/seafile-ldap.py b/seafile-ldap.py
index c4f0f92..1776645 100644
--- a/seafile-ldap.py
+++ b/seafile-ldap.py
@@ -250,7 +250,7 @@ for ldapGroup in ldapGroups:
             seafileGroupMembers = request('admin/groups/{0}/members/'.format(seafileGroup['id']), seafileURL, seafileToken)['response']['members']
             for ldapGroupMember in ldapGroup.member:
                 logger.debug("Searching for LDAP user {0}".format(ldapGroupMember))
-                ldap.search(ldapBase, '(&(distinguishedName={0})(!(userAccountControl:1.2.840.113556.1.4.803:=2))({1}))'.format(ldapGroupMember, ldapFilter), attributes=['*'])
+                ldap.search(ldapBase, '(&(distinguishedName={0})(!(userAccountControl:1.2.840.113556.1.4.803:=2))({1}))'.format(ldapGroupMember, ldapFilter), attributes=['mail'])
                 count = len(ldap.entries)
                 logger.debug("Found {0} LDAP user.".format(count))
                 print(ldap.entries)