diff --git a/docs/extras/openapi30.json b/docs/extras/openapi30.json
index e1a53560..2ac070ad 100644
--- a/docs/extras/openapi30.json
+++ b/docs/extras/openapi30.json
@@ -824,7 +824,8 @@
           },
           "empty": {
             "type": "boolean",
-            "description": "A Boolean value indicating if there is an empty result set"
+            "description": "A Boolean value indicating if there is an empty result set",
+            "required": true
           }
         },
         "required": [