diff --git a/apps/website/docs/getting-started/usage.md b/apps/website/docs/getting-started/usage.md
index ce73d6d..14af408 100644
--- a/apps/website/docs/getting-started/usage.md
+++ b/apps/website/docs/getting-started/usage.md
@@ -75,7 +75,7 @@ function() {
     const messageRef = useRef(null);
 
     const load = async () => {
-        const baseURL = 'https://unpkg.com/@ffmpeg/core-mt@0.12.0-alpha.2/dist/umd'
+        const baseURL = 'https://unpkg.com/@ffmpeg/core-mt@0.12.1/dist/umd'
         const ffmpeg = ffmpegRef.current;
         ffmpeg.on("log", ({ message }) => {
             messageRef.current.innerHTML = message;
@@ -184,7 +184,7 @@ function() {
     const load = async () => {
         const ffmpeg = ffmpegRef.current;
         // Listen to progress event instead of log.
-        ffmpeg.on("progress", (progress) => {
+        ffmpeg.on("progress", ({ progress }) => {
             messageRef.current.innerHTML = `${progress * 100} %`;
         });
         await ffmpeg.load();
diff --git a/apps/website/src/components/Playground/const.ts b/apps/website/src/components/Playground/const.ts
index a4f1802..23cdc70 100644
--- a/apps/website/src/components/Playground/const.ts
+++ b/apps/website/src/components/Playground/const.ts
@@ -1,4 +1,4 @@
-export const CORE_VERSION = "0.12.0-alpha.2";
+export const CORE_VERSION = "0.12.1";
 
 export const CORE_URL = `https://unpkg.com/@ffmpeg/core@${CORE_VERSION}/dist/umd/ffmpeg-core.js`;
 export const CORE_MT_URL = `https://unpkg.com/@ffmpeg/core-mt@${CORE_VERSION}/dist/umd/ffmpeg-core.js`;