diff --git a/README.md b/README.md
index d31886a..be6ef50 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ Second, it shows how to deal with specific types of resources in different group
 ### `service-monitor-safer.slok.dev`
 
 - Webhook type: Mutating.
-- Resources affected: [ServiceMonitors] (`monitoring.coreos.com/v1`) CRD.
+- Resources affected: [ServiceMonitors](https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/api-reference/api.md) (`monitoring.coreos.com/v1`) CRD.
 
 This webhook show two things.