diff --git a/src/polyfills/Promise.withResolvers.ts b/src/polyfills/Promise.withResolvers.ts
new file mode 100644
index 0000000..37e186c
--- /dev/null
+++ b/src/polyfills/Promise.withResolvers.ts
@@ -0,0 +1,18 @@
+/// <reference lib="esnext.promise" />
+
+// eslint-disable-next-line @typescript-eslint/unbound-method
+Promise.withResolvers ??= function <T>(): PromiseWithResolvers<T> {
+	let resolve: (value: T | PromiseLike<T>) => void,
+		// eslint-disable-next-line @typescript-eslint/no-explicit-any
+		reject: (reason?: any) => void;
+	const promise = new Promise<T>((res, rej) => {
+		resolve = res;
+		reject = rej;
+	});
+	return { promise, resolve, reject };
+};
+
+// @ts-expect-error 2540
+Symbol['dispose'] ??= Symbol('Symbol.dispose');
+// @ts-expect-error 2540
+Symbol['asyncDispose'] ??= Symbol('Symbol.asyncDispose');