diff --git a/ramls/invoice_audit_event.json b/ramls/invoice_audit_event.json
index 4fcea77..ea5359a 100644
--- a/ramls/invoice_audit_event.json
+++ b/ramls/invoice_audit_event.json
@@ -36,5 +36,5 @@
       "javaType": "java.lang.Object"
     }
   },
-  "additionalProperties": false
+  "additionalProperties": true
 }