diff --git a/README.md b/README.md
index e52a401d48..3db9dab511 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,7 @@ An Ingress Controller is a daemon, deployed as a Kubernetes Pod, that watches th
 - [Proxy Protocol](#proxy-protocol)
 - [ModSecurity Web Application Firewall](docs/user-guide/modsecurity.md)
 - [Opentracing](docs/user-guide/opentracing.md)
+- [VTS and Prometheus metrics](docs/examples/customization/custom-vts-metrics-prometheus/README.md)
 - [Custom errors](docs/user-guide/custom-errors.md)
 - [NGINX status page](docs/user-guide/nginx-status-page.md)
 - [Running multiple ingress controllers](#running-multiple-ingress-controllers)