diff --git a/documentation/docs/articles/extensions/openpanel-and-fossbilling.md b/documentation/docs/articles/extensions/openpanel-and-fossbilling.md
index 3eb32583..8d5b30ba 100644
--- a/documentation/docs/articles/extensions/openpanel-and-fossbilling.md
+++ b/documentation/docs/articles/extensions/openpanel-and-fossbilling.md
@@ -1,6 +1,6 @@
 # OpenPanel and FOSSBilling
 
-OpenPanel Enterprise edition has billing integrations with WHMCS and FOSSBilling.
+OpenPanel Enterprise edition has billing integrations with [WHMCS](/docs/articles/extensions/openpanel-and-whmcs/) and FOSSBilling.
 
 ## OpenPanel