diff --git a/docs/docs.gradle b/docs/docs.gradle
index 6973870a6b..63f30046cd 100644
--- a/docs/docs.gradle
+++ b/docs/docs.gradle
@@ -24,6 +24,7 @@ project('manual') {
               idprefix: '',
               idseparator: '-',
               doctype: 'book',
+              numbered: '',
               'spring-security-version' : project.version,
               revnumber : project.version
           ]