diff --git a/k8s/core/system-upgrade/crd.yaml b/k8s/core/system-upgrade/crd.yaml
index 927a8ca..e8b3c58 100644
--- a/k8s/core/system-upgrade/crd.yaml
+++ b/k8s/core/system-upgrade/crd.yaml
@@ -26,6 +26,7 @@ spec:
     name: v1
     schema:
       openAPIV3Schema:
+        additionalProperties: false
         properties:
           spec:
             properties: