diff --git a/Schema/RegToken.json b/Schema/RegToken.json
index 48f7090..12154ad 100644
--- a/Schema/RegToken.json
+++ b/Schema/RegToken.json
@@ -53,7 +53,7 @@
           "type": "integer"
         },
         "grants": {
-          "type": "[string]"
+          "type": "array"
         }
       },
       "type": "struct"