diff --git a/docs/nodes/onprem.md b/docs/nodes/onprem.md
index 62ec53ad..ff4bcc16 100644
--- a/docs/nodes/onprem.md
+++ b/docs/nodes/onprem.md
@@ -26,11 +26,6 @@ Node classes list of onprem provider.
 - **diagrams.onprem.cd.TektonCli**
 - **diagrams.onprem.cd.Tekton**
 
-## onprem.certificates
-
-- **diagrams.onprem.certificates.CertManager**
-- **diagrams.onprem.certificates.LetsEncrypt**
-
 ## onprem.ci
 
 - **diagrams.onprem.ci.Circleci**, **CircleCI** (alias)