diff --git a/lib/get-readers.js b/lib/get-readers.js
index 2ebe41b..b2b2fd9 100644
--- a/lib/get-readers.js
+++ b/lib/get-readers.js
@@ -1,5 +1,7 @@
 'use strict';
 
+const watchFiles = [];
+
 const getExt = value => {
   const parts = value.split('.');
   return parts[parts.length - 1];
@@ -114,7 +116,18 @@ const getReaders = async (handler, vcdPath) => {
     });
 
     dropZoneEl.addEventListener('click', () => {
-      inputEl.click();
+      if (window.showOpenFilePicker){
+        showOpenFilePicker().then(async fileHandle => {
+          const files = await Promise.all(fileHandle.map(async file => {
+            return await file.getFile();
+          }))
+          watchFiles.push({fileHandle, files});
+          await handleFiles({files}, handler)();
+        });
+        return;
+      } else {
+        inputEl.click();
+      }
     }, false);
 
 
@@ -144,5 +157,7 @@ const getReaders = async (handler, vcdPath) => {
 };
 
 module.exports = getReaders;
+module.exports.watchFiles = watchFiles;
+module.exports.handleFiles = handleFiles;
 
 /* eslint-env browser */
diff --git a/lib/vcdrom.js b/lib/vcdrom.js
index 610480f..3941063 100644
--- a/lib/vcdrom.js
+++ b/lib/vcdrom.js
@@ -123,10 +123,33 @@ global.VCDrom = async (divName, vcdPath) => {
 
   content.innerHTML = stringify(dropZone({width: 2048, height: 2048}));
   const mod = await createVCD();
-  const inst = await webVcdParser(mod); // VCD parser instance
+  let inst = await webVcdParser(mod); // VCD parser instance
   const handler = getHandler(content, inst);
   await getReaders(handler, vcdPath);
   // console.log(content);
+
+  if (window.showOpenFilePicker == undefined) {
+    return;
+  }
+  setInterval(async () => {
+    getReaders.watchFiles.map(
+      async ({fileHandle, files}) => {
+        const newFiles = await Promise.all(fileHandle.map(async file => {
+          return await file.getFile();
+        }));
+        const allEq = newFiles.every((newFile, i) => {
+          const file = files[i];
+          const eq = newFile.lastModified === file.lastModified;
+          getReaders.watchFiles[i].files = newFiles;
+          return eq;
+        });
+        if (!allEq) {
+          inst = await webVcdParser(mod);
+          const handler = getHandler(content, inst);
+          await getReaders.handleFiles({files: newFiles}, handler)();
+        }
+      });
+  }, 1000);
 };
 
 /* eslint-env browser */