diff --git a/models/notifications-api-model/notifications.json b/models/notifications-api-model/notifications.json
index fd92a09..779a193 100644
--- a/models/notifications-api-model/notifications.json
+++ b/models/notifications-api-model/notifications.json
@@ -1,7 +1,7 @@
 {
   "swagger": "2.0",
   "info": {
-    "description": "The Selling Partner API for Notifications lets you subscribe to notifications that are relevant to a selling partner's business. Using this API you can create a destination to receive notifications, subscribe to notifications, delete notification subscriptions, and more.",
+    "description": "The Selling Partner API for Notifications lets you subscribe to notifications that are relevant to a selling partner's business. Using this API you can create a destination to receive notifications, subscribe to notifications, delete notification subscriptions, and more.\n\nFor more information, see the [Notifications Use Case Guide](https://github.com/amzn/selling-partner-api-docs/blob/main/guides/en-US/use-case-guides/notifications-api-use-case-guide/notifications-use-case-guide-v1.md)",
     "version": "v1",
     "title": "Selling Partner API for Notifications",
     "contact": {
@@ -1938,7 +1938,8 @@
         "LISTINGS_ITEM_ISSUES_CHANGE",
         "MFN_ORDER_STATUS_CHANGE",
         "B2B_ANY_OFFER_CHANGED",
-        "ACCOUNT_STATUS_CHANGED"
+        "ACCOUNT_STATUS_CHANGED",
+        "PRODUCT_TYPE_DEFINITIONS_CHANGE"
       ],
       "x-docgen-enum-table-extension": [
         {
@@ -1981,6 +1982,10 @@
           "value": "LISTINGS_ITEM_ISSUES_CHANGE",
           "description": "Sent whenever there are issues change for any SKU that the selling partner has."
         },
+        {
+          "value": "PRODUCT_TYPE_DEFINITIONS_CHANGE",
+          "description": "Sent whenever there is a new Product Type or a Product Type Version in a marketplace."
+        },
         {
           "value": "MFN_ORDER_STATUS_CHANGE",
           "description": "Sent whenever there is a change in the status of an MFN order availability."
@@ -1991,9 +1996,9 @@
         },
         {
           "value": "ACCOUNT_STATUS_CHANGED",
-          "description": "Sent whenever the Account Status changes for the developers subscribed merchant/marketplace pairs. A notification is published whenever the merchant's account status changes between NORMAL, WARNING, AT_RISK, and SUSPENDED.\n\n The notification will have a payload with 2 fields: previousAccountStatus and currentAccountStatus to indicate the direction of the change."
+          "description": "Sent whenever the Account Status changes for the developers subscribed merchant/marketplace pairs. A notification is published whenever the merchant's account status changes between NORMAL, AT_RISK, and DEACTIVATED.\n\n The notification will have a payload with 2 fields: previousAccountStatus and currentAccountStatus to indicate the direction of the change."
         }
       ]
     }
   }
-}
+}
\ No newline at end of file