diff --git a/sw.js b/sw.js
new file mode 100644
index 0000000..b159467
--- /dev/null
+++ b/sw.js
@@ -0,0 +1,24 @@
+self.addEventListener('install', (event) => {
+    event.waitUntil(
+        caches.open('mtg-csv-generator-v1').then((cache) => {
+            return cache.addAll([
+                '/',
+                '/index.html',
+                '/styles.css',
+                '/app.js',
+                '/manifest.json',
+                '/icon.png',
+                '/cash-money.mp3',
+                '/randomWords.js'
+            ]);
+        })
+    );
+});
+
+self.addEventListener('fetch', (event) => {
+    event.respondWith(
+        caches.match(event.request).then((response) => {
+            return response || fetch(event.request);
+        })
+    );
+});