diff --git a/policy-engine/src/openapiv3.json b/policy-engine/src/openapiv3.json
index 3b456c710..6be6dcb48 100644
--- a/policy-engine/src/openapiv3.json
+++ b/policy-engine/src/openapiv3.json
@@ -101,7 +101,10 @@
                         "type": "string"
                     },
                     "metadata": {
-                        "type": "string"
+                        "type": "object",
+                        "additionalProperties": {
+                            "type": "string"
+                        }
                     }
                 }
             },