diff --git a/schemas/bind.unkin.net/bindtsigkey_v1alpha1.json b/schemas/bind.unkin.net/bindtsigkey_v1alpha1.json
index 1b64e8d..2b3ae33 100644
--- a/schemas/bind.unkin.net/bindtsigkey_v1alpha1.json
+++ b/schemas/bind.unkin.net/bindtsigkey_v1alpha1.json
@@ -24,6 +24,9 @@
           ],
           "type": "string"
         },
+        "clusterRef": {
+          "type": "string"
+        },
         "importExisting": {
           "type": "boolean"
         },