diff --git a/types/office-js/index.d.ts b/types/office-js/index.d.ts
index 935c7b3c35..4c5f6f0ad2 100644
--- a/types/office-js/index.d.ts
+++ b/types/office-js/index.d.ts
@@ -288,6 +288,10 @@ declare namespace Office {
          * Triggers when a document level selection happens
          */
         DocumentSelectionChanged,
+        /**
+         * Triggers when the active item changes
+         */
+        ItemChanged,
         /**
          * Triggers when a customXmlPart node was deleted
          */
@@ -1897,6 +1901,14 @@ declare namespace Office {
         ewsUrl: string;
         item: Item;
         userProfile: UserProfile;
+        /**
+         * Adds an event handler for a supported event
+         * @param eventType The event that should invoke the handler
+         * @param handler The function to handle the event
+         * @param options Any optional parameters or state data passed to the method
+         * @param callback The optional method to call when the handler is added
+         */
+        addHandlerAsync(eventType: Office.EventType, handler: (type: Office.EventType) => void, options?: any, callback?: (result: AsyncResult) => void): void;
         /**
          * Converts an item ID formatted for REST into EWS format.
          * @param itemId An item ID formatted for the Outlook REST APIs