diff --git a/postgresql.cnpg.io/cluster_v3.json b/postgresql.cnpg.io/cluster_v3.json
new file mode 100644
index 00000000..5ead9459
--- /dev/null
+++ b/postgresql.cnpg.io/cluster_v3.json
@@ -0,0 +1,11 @@
+{
+  "properties": {
+    "spec": {
+      "x-kubernetes-preserve-unknown-fields": true
+    },
+    "status": {
+      "x-kubernetes-preserve-unknown-fields": true
+    }
+  },
+  "type": "object"
+}