diff --git a/js/ffmpeg.js b/js/ffmpeg.js
index f9fbd62..40345f7 100644
--- a/js/ffmpeg.js
+++ b/js/ffmpeg.js
@@ -1,4 +1,5 @@
 import { fetchBlobURL } from './utils';
+import FfmpegWorker from './ffmpeg.worker.js?worker'
 const ffmpegBase = 'https://unpkg.com/@ffmpeg/core/dist/esm';
 const coreJs = `${ffmpegBase}/ffmpeg-core.js`;
 const coreWasm = `${ffmpegBase}/ffmpeg-core.wasm`;
@@ -37,7 +38,7 @@ async function ffmpegWorker(
     const assets = loadFfmpeg();
 
     return new Promise((resolve, reject) => {
-        const worker = new Worker(new URL('./ffmpeg.worker.js', import.meta.url), { type: 'module' });
+        const worker = new FfmpegWorker();
 
         // Handle abort signal
         const abortHandler = () => {
diff --git a/js/taglib.ts b/js/taglib.ts
index c485c99..c70ef53 100644
--- a/js/taglib.ts
+++ b/js/taglib.ts
@@ -9,8 +9,8 @@ import type {
     TagLibMetadataResponse,
     TagLibMetadata,
     TagLibReadMetadata,
-} from './taglib.worker';
-import TagLibWorker from './taglib.worker.ts?url';
+} from './taglib.types';
+import TagLibWorker from './taglib.worker?worker';
 
 let tagLib: Promise<TagLib> | null = null;
 
@@ -32,7 +32,7 @@ export async function addMetadataWithTagLib(
         audioData = new Uint8Array(audioData);
     }
 
-    const worker = new Worker(new URL(TagLibWorker, import.meta.url), { type: 'module' });
+    const worker = new TagLibWorker();
     const wasmUrl = await fetchTagLib();
 
     return new Promise<Uint8Array>((resolve, reject) => {
diff --git a/js/taglib.types.ts b/js/taglib.types.ts
new file mode 100644
index 0000000..5af538d
--- /dev/null
+++ b/js/taglib.types.ts
@@ -0,0 +1,55 @@
+export type TagLibWorkerMessageType = 'Add' | 'Get';
+
+export interface TagLibWorkerMessage {
+    type: TagLibWorkerMessageType;
+    wasmUrl: string;
+    audioData: Uint8Array;
+}
+
+export interface TagLibWorkerResponse<T> {
+    type: TagLibWorkerMessageType;
+    data?: T;
+    error?: string;
+}
+
+export interface TagLibMetadata {
+    title?: string;
+    artist?: string;
+    albumTitle?: string;
+    albumArtist?: string;
+    trackNumber?: number;
+    totalTracks?: number;
+    discNumber?: number;
+    totalDiscs?: number;
+    bpm?: number;
+    replayGain?: {
+        albumReplayGain?: string;
+        albumPeakAmplitude?: number;
+        trackReplayGain?: string;
+        trackPeakAmplitude?: number;
+    };
+    cover?: {
+        data: Uint8Array;
+        type: string;
+    };
+    releaseDate?: string;
+    copyright?: string;
+    isrc?: string;
+    explicit?: boolean;
+    lyrics?: string;
+}
+
+export interface TagLibReadMetadata extends TagLibMetadata {
+    duration: number;
+}
+
+export type TagLibFileResponse = TagLibWorkerResponse<Uint8Array>;
+export type TagLibMetadataResponse = TagLibWorkerResponse<TagLibReadMetadata>;
+
+export type AddMetadataMessage = TagLibWorkerMessage & {
+    type: 'Add';
+} & TagLibMetadata;
+
+export type GetMetadataMessage = TagLibWorkerMessage & {
+    type: 'Get';
+};
diff --git a/js/taglib.worker.ts b/js/taglib.worker.ts
index cd04a09..44ec706 100644
--- a/js/taglib.worker.ts
+++ b/js/taglib.worker.ts
@@ -3,67 +3,21 @@ declare var self: DedicatedWorkerGlobalScope;
 
 import { TagLib, type PictureType } from 'taglib-wasm';
 import { doTimed, doTimedAsync } from './doTimed';
+import type {
+    AddMetadataMessage,
+    GetMetadataMessage,
+    TagLibFileResponse,
+    TagLibMetadata,
+    TagLibMetadataResponse,
+    TagLibReadMetadata,
+    TagLibWorkerMessage,
+    TagLibWorkerResponse,
+} from './taglib.types';
 
 const PICTURE_TYPE_VALUES = {
     FrontCover: 3,
 };
 
-export type TagLibWorkerMessageType = 'Add' | 'Get';
-
-export interface TagLibWorkerMessage {
-    type: TagLibWorkerMessageType;
-    wasmUrl: string;
-    audioData: Uint8Array;
-}
-
-interface TagLibWorkerResponse<T> {
-    type: TagLibWorkerMessageType;
-    data?: T;
-    error?: string;
-}
-
-export interface TagLibMetadata {
-    title?: string;
-    artist?: string;
-    albumTitle?: string;
-    albumArtist?: string;
-    trackNumber?: number;
-    totalTracks?: number;
-    discNumber?: number;
-    totalDiscs?: number;
-    bpm?: number;
-    replayGain?: {
-        albumReplayGain?: string;
-        albumPeakAmplitude?: number;
-        trackReplayGain?: string;
-        trackPeakAmplitude?: number;
-    };
-    cover?: {
-        data: Uint8Array;
-        type: string;
-    };
-    releaseDate?: string;
-    copyright?: string;
-    isrc?: string;
-    explicit?: boolean;
-    lyrics?: string;
-}
-
-export interface TagLibReadMetadata extends TagLibMetadata {
-    duration: number;
-}
-
-export type TagLibFileResponse = TagLibWorkerResponse<Uint8Array>;
-export type TagLibMetadataResponse = TagLibWorkerResponse<TagLibReadMetadata>;
-
-export type AddMetadataMessage = TagLibWorkerMessage & {
-    type: 'Add';
-} & TagLibMetadata;
-
-export type GetMetadataMessage = TagLibWorkerMessage & {
-    type: 'Get';
-};
-
 async function addMetadataToAudio(message: AddMetadataMessage): Promise<Uint8Array> {
     const {
         wasmUrl,
diff --git a/vite.config.js b/vite.config.js
index 68fe1ec..9ecd444 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -10,6 +10,9 @@ export default defineConfig(({ mode }) => {
 
     return {
         base: './',
+        worker: {
+            format: 'es',
+        },
         resolve: {
             alias: {
                 '!': '/node_modules',