diff --git a/js/ffmpeg.js b/js/ffmpeg.js
index 93cd1ab..d62e713 100644
--- a/js/ffmpeg.js
+++ b/js/ffmpeg.js
@@ -1,8 +1,7 @@
 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`;
+import coreJs from '!/@ffmpeg/core/dist/esm/ffmpeg-core.js?url';
+import coreWasm from '!/@ffmpeg/core/dist/esm/ffmpeg-core.wasm?url';
 
 class FfmpegError extends Error {
     constructor(message) {