diff --git a/TranslatorReasonerAPI.yaml b/TranslatorReasonerAPI.yaml
index 42a90bd..8d3166c 100644
--- a/TranslatorReasonerAPI.yaml
+++ b/TranslatorReasonerAPI.yaml
@@ -816,6 +816,7 @@ components:
             on bound nodes.
           additionalProperties:
             $ref: '#/components/schemas/QNode'
+          minProperties: 1
         edges:
           type: object
           description: >-