diff --git a/next.config.js b/next.config.js
index 9f78a09..aee8738 100644
--- a/next.config.js
+++ b/next.config.js
@@ -2,6 +2,12 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   optimizeFonts: false,
+  images: {
+    formats: ['image/webp', 'image/avif'],
+    minimumCacheTTL: 60,
+    deviceSizes: [640, 750, 828, 1080, 1200, 1920],
+    imageSizes: [16, 32, 48, 64, 96, 128, 256, 384],
+  },
 }
 
 const isDev = process.env.NODE_ENV !== 'production'
diff --git a/src/pages/break/talks/[talkId].tsx b/src/pages/break/talks/[talkId].tsx
index 371be1b..a7e6054 100644
--- a/src/pages/break/talks/[talkId].tsx
+++ b/src/pages/break/talks/[talkId].tsx
@@ -54,8 +54,9 @@ function Pages() {
   return (
     <>
       <div>
+        <link rel="preload" as="image" href="/pek2025/background.webp" />
         <link rel="stylesheet" href="https://use.typekit.net/egz6rzg.css" />
-        <link rel="stylesheet" href="https://use.typekit.net/hbv7ezy.css" />
+        {/* <link rel="stylesheet" href="https://use.typekit.net/hbv7ezy.css" /> */}
       </div>
       {config.debug && (
         <>