diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index fb4a7f097..f37b6ff2b 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -1514,9 +1514,9 @@ interface DataTransferItemList {
     length: number;
     add(data: File): DataTransferItem;
     clear(): void;
-    item(index: number): File;
+    item(index: number): DataTransferItem;
     remove(index: number): void;
-    [index: number]: File;
+    [index: number]: DataTransferItem;
 }
 
 declare var DataTransferItemList: {
@@ -3770,6 +3770,7 @@ interface HTMLCanvasElement extends HTMLElement {
       * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
       */
     toDataURL(type?: string, ...args: any[]): string;
+    toBlob(): Blob;
 }
 
 declare var HTMLCanvasElement: {
diff --git a/inputfiles/addedTypes.json b/inputfiles/addedTypes.json
index c49d24437..a3c8dffac 100644
--- a/inputfiles/addedTypes.json
+++ b/inputfiles/addedTypes.json
@@ -302,5 +302,11 @@
         "interface": "HTMLSelectElement",
         "name": "selectedOptions",
         "type": "HTMLCollection"
+    },
+    {
+        "kind": "method",
+        "interface": "HTMLCanvasElement",
+        "name": "toBlob",
+        "signatures": ["toBlob(): Blob"]
     }
 ]
diff --git a/inputfiles/overridingTypes.json b/inputfiles/overridingTypes.json
index 25d2e1d11..837c591c0 100644
--- a/inputfiles/overridingTypes.json
+++ b/inputfiles/overridingTypes.json
@@ -295,5 +295,16 @@
         "interface": "IDBDatabase",
         "name": "version",
         "type": "number"
+    },
+    {
+        "kind": "method",
+        "interface": "DataTransferItemList",
+        "name": "item",
+        "signatures": ["item(index: number): DataTransferItem"]
+    },
+    {
+        "kind": "indexer",
+        "interface": "DataTransferItemList",
+        "signatures": ["[index: number]: DataTransferItem"]
     }
 ]