diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 8be5f3626..a87ce4fc7 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -6894,7 +6894,7 @@ interface IDBCursor {
     direction: string;
     key: any;
     primaryKey: any;
-    source: any;
+    source: IDBObjectStore | IDBIndex;
     advance(count: number): void;
     continue(key?: any): void;
     delete(): IDBRequest;
@@ -6932,7 +6932,7 @@ interface IDBDatabase extends EventTarget {
     close(): void;
     createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
     deleteObjectStore(name: string): void;
-    transaction(storeNames: any, mode?: string): IDBTransaction;
+    transaction(storeNames: string | string[], mode?: string): IDBTransaction;
     addEventListener(type: "abort", listener: (ev: Event) => any, useCapture?: boolean): void;
     addEventListener(type: "error", listener: (ev: ErrorEvent) => any, useCapture?: boolean): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
@@ -6990,9 +6990,10 @@ declare var IDBKeyRange: {
 
 interface IDBObjectStore {
     indexNames: DOMStringList;
-    keyPath: string;
+    keyPath: string | string[];
     name: string;
     transaction: IDBTransaction;
+    autoIncrement: boolean;
     add(value: any, key?: any): IDBRequest;
     clear(): IDBRequest;
     count(key?: any): IDBRequest;
@@ -7031,7 +7032,7 @@ interface IDBRequest extends EventTarget {
     onsuccess: (ev: Event) => any;
     readyState: string;
     result: any;
-    source: any;
+    source: IDBObjectStore | IDBIndex | IDBCursor;
     transaction: IDBTransaction;
     addEventListener(type: "error", listener: (ev: ErrorEvent) => any, useCapture?: boolean): void;
     addEventListener(type: "success", listener: (ev: Event) => any, useCapture?: boolean): void;
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index 3c8574ccf..35dc82333 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -275,7 +275,7 @@ interface IDBCursor {
     direction: string;
     key: any;
     primaryKey: any;
-    source: any;
+    source: IDBObjectStore | IDBIndex;
     advance(count: number): void;
     continue(key?: any): void;
     delete(): IDBRequest;
@@ -313,7 +313,7 @@ interface IDBDatabase extends EventTarget {
     close(): void;
     createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
     deleteObjectStore(name: string): void;
-    transaction(storeNames: any, mode?: string): IDBTransaction;
+    transaction(storeNames: string | string[], mode?: string): IDBTransaction;
     addEventListener(type: "abort", listener: (ev: Event) => any, useCapture?: boolean): void;
     addEventListener(type: "error", listener: (ev: ErrorEvent) => any, useCapture?: boolean): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
@@ -371,9 +371,10 @@ declare var IDBKeyRange: {
 
 interface IDBObjectStore {
     indexNames: DOMStringList;
-    keyPath: string;
+    keyPath: string | string[];
     name: string;
     transaction: IDBTransaction;
+    autoIncrement: boolean;
     add(value: any, key?: any): IDBRequest;
     clear(): IDBRequest;
     count(key?: any): IDBRequest;
@@ -412,7 +413,7 @@ interface IDBRequest extends EventTarget {
     onsuccess: (ev: Event) => any;
     readyState: string;
     result: any;
-    source: any;
+    source: IDBObjectStore | IDBIndex | IDBCursor;
     transaction: IDBTransaction;
     addEventListener(type: "error", listener: (ev: ErrorEvent) => any, useCapture?: boolean): void;
     addEventListener(type: "success", listener: (ev: Event) => any, useCapture?: boolean): void;
diff --git a/inputfiles/addedTypes.json b/inputfiles/addedTypes.json
index 0b6d43156..bf731ab5e 100644
--- a/inputfiles/addedTypes.json
+++ b/inputfiles/addedTypes.json
@@ -361,6 +361,12 @@
         "name": "storageArea?",
         "type": "Storage"
     },
+    {
+        "kind": "property",
+        "interface": "IDBObjectStore",
+        "name": "autoIncrement",
+        "type": "boolean"
+    },
     {
         "kind": "interface",
         "name": "HTMLPictureElement",
diff --git a/inputfiles/overridingTypes.json b/inputfiles/overridingTypes.json
index 80353d667..48f1b2ca5 100644
--- a/inputfiles/overridingTypes.json
+++ b/inputfiles/overridingTypes.json
@@ -320,6 +320,30 @@
             "new (type: string, eventInitDict?: StorageEventInit): StorageEvent"
         ]
     },
+    {
+        "kind": "property",
+        "interface": "IDBCursor",
+        "name": "source",
+        "type": "IDBObjectStore | IDBIndex"
+    },
+    {
+        "kind": "method",
+        "interface": "IDBDatabase",
+        "name": "transaction",
+        "signatures": ["transaction(storeNames: string | string[], mode?: string): IDBTransaction"]
+    },
+    {
+        "kind": "property",
+        "interface": "IDBObjectStore",
+        "name": "keyPath",
+        "type": "string | string[]"
+    },
+    {
+        "kind": "property",
+        "interface": "IDBRequest",
+        "name": "source",
+        "type": "IDBObjectStore | IDBIndex | IDBCursor"
+    },
     {
         "kind": "method",
         "interface": "Window",