diff --git a/additional_sg_rules.tf b/additional_sg_rules.tf
index b93a8bf..f4f5908 100644
--- a/additional_sg_rules.tf
+++ b/additional_sg_rules.tf
@@ -26,11 +26,11 @@ locals {
       type                          = "ingress"
     }
     ingress_cert_manager_webhook = {
-      description                   = "Cert Manager webhook"
-      from_port                     = 9402
+      description                   = "cert-manager webhook"
+      from_port                     = 10260
       protocol                      = "tcp"
       source_cluster_security_group = true
-      to_port                       = 9402
+      to_port                       = 10260
       type                          = "ingress"
     }
   }