diff --git a/README.md b/README.md
index d31dd2f..5ba58ab 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ Rule to manage iptables
   * [iptables_default_head](#iptables_default_head)
   * [iptables_default_tail](#iptables_default_tail)
   * [iptables_custom_rules](#iptables_custom_rules)
+  * [iptables_custom_rules_extra](#iptables_custom_rules_extra)
   * [iptables_keep_unmanaged](#iptables_keep_unmanaged)
 * [Dependencies](#dependencies)
 * [License](#license)
@@ -51,6 +52,14 @@ iptables_default_tail: "-A INPUT -j REJECT\n-A FORWARD -j REJECT\n"
 iptables_custom_rules: []
 ```
 
+### iptables_custom_rules_extra
+
+#### Default value
+
+```YAML
+iptables_custom_rules_extra: []
+```
+
 ### iptables_keep_unmanaged
 
 By default this role deletes all iptables rules which are not managed by Ansible. Set this to 'yes', if you want the role to keep unmanaged rules.