diff --git a/kubernetes/kyak/apps/tools/system-upgrade-controller/plans/kustomization.yaml b/kubernetes/kyak/apps/tools/system-upgrade-controller/plans/kustomization.yaml
index fdd840dee3..2ef0c7255a 100644
--- a/kubernetes/kyak/apps/tools/system-upgrade-controller/plans/kustomization.yaml
+++ b/kubernetes/kyak/apps/tools/system-upgrade-controller/plans/kustomization.yaml
@@ -1,4 +1,5 @@
 ---
+# yaml-language-server: $schema=https://json.schemastore.org/kustomization
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources: