diff --git a/openapi.yaml b/openapi.yaml
index 9d6090a..1cc4489 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -239,6 +239,7 @@ components:
   schemas:
     Metadata:
       type: object
+      nullable: true
       additionalProperties: {}
     ClientOptions:
       type: object