diff --git a/src/lib/dom.generated.d.ts b/src/lib/dom.generated.d.ts
index feb38887ab9..d4ee81e4974 100644
--- a/src/lib/dom.generated.d.ts
+++ b/src/lib/dom.generated.d.ts
@@ -3885,7 +3885,7 @@ interface Headers {
 
 declare var Headers: {
     prototype: Headers;
-    new(init?: Headers | string[][]): Headers;
+    new(init?: Headers | string[][] | object): Headers;
 };
 
 interface History {
@@ -9514,7 +9514,7 @@ interface ServiceWorkerContainer extends EventTarget {
     oncontrollerchange: (this: ServiceWorkerContainer, ev: Event) => any;
     onmessage: (this: ServiceWorkerContainer, ev: ServiceWorkerMessageEvent) => any;
     readonly ready: Promise<ServiceWorkerRegistration>;
-    getRegistration(clientURL?: USVString): Promise<any>;
+    getRegistration(): Promise<ServiceWorkerRegistration | undefined>;
     getRegistrations(): Promise<ServiceWorkerRegistration[]>;
     register(scriptURL: USVString, options?: RegistrationOptions): Promise<ServiceWorkerRegistration>;
     addEventListener<K extends keyof ServiceWorkerContainerEventMap>(type: K, listener: (this: ServiceWorkerContainer, ev: ServiceWorkerContainerEventMap[K]) => any, useCapture?: boolean): void;
diff --git a/src/lib/webworker.generated.d.ts b/src/lib/webworker.generated.d.ts
index 38c0cfeefff..821a7edd886 100644
--- a/src/lib/webworker.generated.d.ts
+++ b/src/lib/webworker.generated.d.ts
@@ -470,7 +470,7 @@ interface Headers {
 
 declare var Headers: {
     prototype: Headers;
-    new(init?: Headers | string[][]): Headers;
+    new(init?: Headers | string[][] | object): Headers;
 };
 
 interface IDBCursor {