diff --git a/index.html b/index.html
old mode 100644
new mode 100755
index dd3c9063..d8fa5e37
--- a/index.html
+++ b/index.html
@@ -38,9 +38,16 @@
 
       client.install(document.body)
 
-      window.addEventListener('load', () => { 
+      window.addEventListener('load', () => {
         client.start()
       })
+
+      if ('serviceWorker' in navigator) {
+        try {
+          navigator.serviceWorker.register('sw.js');
+        } catch ( error ) {
+        }
+      }
     </script>
   </body>
 </html>
diff --git a/manifest.json b/manifest.json
new file mode 100644
index 00000000..972e1f94
--- /dev/null
+++ b/manifest.json
@@ -0,0 +1,14 @@
+{
+  "name": "Orca",
+  "short_name": "Orca",
+  "start_url": ".",
+  "scope": ".",
+  "display": "standalone",
+  "icons": [
+    {
+      "src": "./desktop/icon.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ]
+}
diff --git a/sw.js b/sw.js
new file mode 100644
index 00000000..240225cb
--- /dev/null
+++ b/sw.js
@@ -0,0 +1,73 @@
+// 220
+
+const assets = [
+
+  './',
+
+  './manifest.json',
+  './desktop/icon.png',
+
+  './desktop/sources/links/style.css',
+  './desktop/sources/links/reset.css',
+  './desktop/sources/links/fonts.css',
+  './desktop/sources/links/main.css',
+  './desktop/sources/links/theme.css',
+
+  './desktop/sources/scripts/lib/acels.js',
+  './desktop/sources/scripts/lib/theme.js',
+  './desktop/sources/scripts/lib/history.js',
+  './desktop/sources/scripts/lib/source.js',
+  './desktop/sources/scripts/core/library.js',
+  './desktop/sources/scripts/core/io.js',
+  './desktop/sources/scripts/core/operator.js',
+  './desktop/sources/scripts/core/orca.js',
+  './desktop/sources/scripts/core/transpose.js',
+  './desktop/sources/scripts/core/io/cc.js',
+  './desktop/sources/scripts/core/io/midi.js',
+  './desktop/sources/scripts/core/io/mono.js',
+  './desktop/sources/scripts/core/io/osc.js',
+  './desktop/sources/scripts/core/io/udp.js',
+  './desktop/sources/scripts/clock.js',
+  './desktop/sources/scripts/commander.js',
+  './desktop/sources/scripts/cursor.js',
+  './desktop/sources/scripts/client.js'
+
+];
+
+self.addEventListener( 'install', async function () {
+
+  const cache = await caches.open( 'Orca' );
+
+  assets.forEach( function ( asset ) {
+
+  cache.add( asset ).catch( function () {
+
+  console.error( '[SW] Cound\'t cache:', asset );
+
+  } );
+
+  } );
+
+} );
+
+self.addEventListener( 'fetch', async function ( event ) {
+
+  const request = event.request;
+  event.respondWith( cacheFirst( request ) );
+
+} );
+
+async function cacheFirst( request ) {
+
+  const cachedResponse = await caches.match( request );
+
+  if ( cachedResponse === undefined ) {
+
+  console.error( '[SW] Not cached:', request.url );
+  return fetch( request );
+
+  }
+
+  return cachedResponse;
+
+}