diff --git a/server/src/server.ts b/server/src/server.ts
index bc75143..d4bd9e5 100644
--- a/server/src/server.ts
+++ b/server/src/server.ts
@@ -29,6 +29,14 @@ app.get('/ipad.png', async (req, res) => {
   });
   const screenshot = await puppet_page.screenshot();
   await puppet_page.close();
+
+  // Disable caching
+  res.setHeader(
+    'Cache-Control',
+    'no-store, no-cache, must-revalidate, proxy-revalidate'
+  );
+  res.setHeader('Expires', '0');
+
   res.send(screenshot);
 });
 
diff --git a/src/ipad.ts b/src/ipad.ts
index 26db887..ebb010a 100644
--- a/src/ipad.ts
+++ b/src/ipad.ts
@@ -46,6 +46,7 @@ function refresh() {
     'viewport',
     `${window.innerWidth}x${window.innerHeight}x${window.devicePixelRatio}`
   );
+  url.hash = String(new Date().getTime());
 
   const urlParams = new URLSearchParams(window.location.search);
   if (urlParams.has('tool')) {