diff --git a/docs/api.md b/docs/api.md
index 1ca0faa..f7751de 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -10,6 +10,7 @@
   - [Worker.trim](#worker-trim)
   - [Worker.concatDemuxer](#worker-concatDemuxer)
   - [Worker.run](#worker-run)
+  - [Worker.terminate](#worker-terminate)
 
 ---
 
@@ -230,3 +231,17 @@ Worker.run() is similar to FFmpeg cli tool, aims to provide maximum flexiblity f
   await worker.run("-i flame.avi -s 1920x1080 output.mp4");
 })();
 ```
+
+<a name="worker-run"></a>
+
+### Worker.terminate(): Promise
+
+Worker.terminate() terminates web worker / worker\_threads, after terminate(), you cannot use this worker anymore.
+
+**Examples:**
+
+```javascript
+(async () => {
+  await worker.terminate();
+})();
+```
diff --git a/examples/browser/concatDemuxer.html b/examples/browser/concatDemuxer.html
index 1295ceb..f80803b 100644
--- a/examples/browser/concatDemuxer.html
+++ b/examples/browser/concatDemuxer.html
@@ -49,6 +49,7 @@
             type: "video/mp4"
           })
         );
+        await worker.terminate();
       };
       const elm = document.getElementById("uploader");
       elm.addEventListener("change", transcode);
diff --git a/examples/browser/image2video.html b/examples/browser/image2video.html
index 831a3dd..489af26 100644
--- a/examples/browser/image2video.html
+++ b/examples/browser/image2video.html
@@ -48,6 +48,7 @@
 
         const video = document.getElementById('output-video');
         video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
+        await worker.terminate();
       }
       const elm = document.getElementById('start-btn');
       elm.addEventListener('click', image2video);
diff --git a/examples/browser/run.html b/examples/browser/run.html
index 36c1abe..57b2578 100644
--- a/examples/browser/run.html
+++ b/examples/browser/run.html
@@ -33,12 +33,13 @@
         await worker.load();
         message.innerHTML = 'Start transcoding';
         await worker.write(name, files[0]);
-        await worker.run(`-i /data/${name} output.mp4`, { input: name, output: 'output.mp4' });
+        await worker.run(`-i /data/${name} output.mp4`);
         message.innerHTML = 'Complete transcoding';
         const { data } = await worker.read('output.mp4');
 
         const video = document.getElementById('output-video');
         video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
+        await worker.terminate();
       }
       const elm = document.getElementById('uploader');
       elm.addEventListener('change', transcode);
diff --git a/examples/browser/transcode.html b/examples/browser/transcode.html
index cb14c37..15b82e7 100644
--- a/examples/browser/transcode.html
+++ b/examples/browser/transcode.html
@@ -40,6 +40,7 @@
 
         const video = document.getElementById('output-video');
         video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
+        await worker.terminate();
       }
       const elm = document.getElementById('uploader');
       elm.addEventListener('change', transcode);
diff --git a/examples/browser/trim.html b/examples/browser/trim.html
index 8d8250b..151f31d 100644
--- a/examples/browser/trim.html
+++ b/examples/browser/trim.html
@@ -39,6 +39,7 @@
 
         const video = document.getElementById('output-video');
         video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
+        await worker.terminate();
       }
       const elm = document.getElementById('uploader');
       elm.addEventListener('change', transcode);
diff --git a/examples/browser/webcam.html b/examples/browser/webcam.html
index db348d3..79acb22 100644
--- a/examples/browser/webcam.html
+++ b/examples/browser/webcam.html
@@ -69,6 +69,7 @@
 
         const video = document.getElementById('output-video');
         video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
+        await worker.terminate();
       }
     </script>
   </body>
diff --git a/examples/node/concatDemuxer.js b/examples/node/concatDemuxer.js
index d13e101..c248937 100755
--- a/examples/node/concatDemuxer.js
+++ b/examples/node/concatDemuxer.js
@@ -13,5 +13,5 @@ const worker = createWorker({
   const { data } = await worker.read('flame.mp4');
   console.log('Complete concat');
   fs.writeFileSync('flame.mp4', Buffer.from(data));
-  process.exit(0);
+  await worker.terminate();
 })();
diff --git a/examples/node/image2video.js b/examples/node/image2video.js
index f705f0c..34bdd05 100755
--- a/examples/node/image2video.js
+++ b/examples/node/image2video.js
@@ -24,5 +24,5 @@ const worker = createWorker({
     await worker.remove(`tmp.${num}.png`);
   }
   fs.writeFileSync('out.mp4', Buffer.from(data));
-  process.exit(0);
+  await worker.terminate();
 })();
diff --git a/examples/node/run.js b/examples/node/run.js
index 4946333..9857b2d 100755
--- a/examples/node/run.js
+++ b/examples/node/run.js
@@ -13,5 +13,5 @@ const worker = createWorker({
   const { data } = await worker.read('flame.mp4');
   console.log('Complete transcoding');
   fs.writeFileSync('flame.mp4', Buffer.from(data));
-  process.exit(0);
+  await worker.terminate();
 })();
diff --git a/examples/node/transcode.js b/examples/node/transcode.js
index 2fcd626..b9658c8 100755
--- a/examples/node/transcode.js
+++ b/examples/node/transcode.js
@@ -13,5 +13,5 @@ const worker = createWorker({
   const { data } = await worker.read('flame.mp4');
   console.log('Complete transcoding');
   fs.writeFileSync('flame.mp4', Buffer.from(data));
-  process.exit(0);
+  await worker.terminate();
 })();
diff --git a/examples/node/trim.js b/examples/node/trim.js
index d9689b7..a3b3997 100755
--- a/examples/node/trim.js
+++ b/examples/node/trim.js
@@ -13,5 +13,5 @@ const worker = createWorker({
   const { data } = await worker.read('flame_trim.avi');
   console.log('Complete trimming');
   fs.writeFileSync('flame_trim.avi', Buffer.from(data));
-  process.exit(0);
+  await worker.terminate();
 })();
diff --git a/src/createWorker.js b/src/createWorker.js
index 5c8d511..ebce57f 100644
--- a/src/createWorker.js
+++ b/src/createWorker.js
@@ -148,12 +148,14 @@ module.exports = (_options = {}) => {
     return run(`-f concat -safe 0 -i concat_list.txt ${opts} ${output}`, jobId);
   };
 
-  const terminate = async (jobId) => {
+  const terminate = async () => {
     if (worker !== null) {
+      /*
       await startJob(createJob({
         id: jobId,
         action: 'terminate',
       }));
+      */
       worker.terminate();
       worker = null;
     }