diff --git a/specification/communication/data-plane/Chat/preview/2024-06-05-preview/communicationserviceschat.json b/specification/communication/data-plane/Chat/preview/2024-06-05-preview/communicationserviceschat.json
index a10260e6a30d..2d6d51198f7b 100644
--- a/specification/communication/data-plane/Chat/preview/2024-06-05-preview/communicationserviceschat.json
+++ b/specification/communication/data-plane/Chat/preview/2024-06-05-preview/communicationserviceschat.json
@@ -1520,7 +1520,9 @@
         "html",
         "topicUpdated",
         "participantAdded",
-        "participantRemoved"
+        "participantRemoved",
+        "azureBotActivity",
+        "azureBotCommand"
       ],
       "type": "string",
       "x-ms-enum": {