diff --git a/Payment-Gateway-Plugin.md b/Payment-Gateway-Plugin.md
index 3ea5822..6ca45ac 100644
--- a/Payment-Gateway-Plugin.md
+++ b/Payment-Gateway-Plugin.md
@@ -1,3 +1,16 @@
+## Index
+
+- [Installation](https://github.com/hotspotbilling/phpnuxbill/wiki)
+- [How It Works Cara kerja](https://github.com/hotspotbilling/phpnuxbill/wiki/How-It-Works---Cara-kerja)
+- [Cron Jobs](https://github.com/hotspotbilling/phpnuxbill/wiki/Cron-Jobs)
+- [FreeRadius](https://github.com/hotspotbilling/phpnuxbill/wiki/FreeRadius)
+- [Getting Started](https://github.com/hotspotbilling/phpnuxbill/wiki/Getting-Started)
+- [Creating Payment Gateway Plugin](https://github.com/hotspotbilling/phpnuxbill/wiki/Payment-Gateway-Plugin)
+- [Selling Paid Plugin or Payment Gateway](https://github.com/hotspotbilling/phpnuxbill/wiki/Selling-Paid-Plugin-or-Payment-Gateway)
+- [Creating Themes](https://github.com/hotspotbilling/phpnuxbill/wiki/Themes)
+
+## info
+
 You can add your own payment gateway
 
 all plugin put in system/paymentgateway/**paymentGatewayName**.php