diff --git a/schemas/2.0.0.json b/schemas/2.0.0.json
index 9ee14f53..3fc19cde 100644
--- a/schemas/2.0.0.json
+++ b/schemas/2.0.0.json
@@ -652,6 +652,9 @@
                   ]
                 },
                 "payload": {},
+                "messageId": {
+                  "type": "string"
+                },
                 "correlationId": {
                   "oneOf": [
                     {
@@ -874,6 +877,9 @@
             }
           ]
         },
+        "messageId": {
+          "type": "string"
+        },
         "correlationId": {
           "oneOf": [
             {