diff --git a/schema.json b/schema.json
index c2abb6ac..2631c868 100644
--- a/schema.json
+++ b/schema.json
@@ -881,11 +881,10 @@
           "type": "boolean"
         }
       },
+      "additionalProperties": false,
       "required": [
-        "events",
         "period1"
-      ],
-      "additionalProperties": false
+      ]
     },
     "HistoricalOptionsEventsDividends": {
       "type": "object",