diff --git a/schemas/global.json b/schemas/global.json
index ded5e2a..8e0536b 100644
--- a/schemas/global.json
+++ b/schemas/global.json
@@ -187,6 +187,9 @@
                             "Index": {
                                 "type": "integer"
                             },
+                            "MaxReading": {
+                                "type": "integer"
+                            },
                             "Class": {
                                 "type": "string"
                             },