diff --git a/next.config.js b/next.config.js
index cf4798ae71f37..cd0b54769add6 100644
--- a/next.config.js
+++ b/next.config.js
@@ -1,18 +1,16 @@
 const createMDX = require('@next/mdx');
 const remarkPrism = require('remark-prism');
 
-const isProd = process.env.NODE_ENV === 'production';
+const isProd = process.env.NODE_ENV === 'production' && !process.env.IS_PREVIEW;
 
 /** @type {import('next').NextConfig} */
 const nextConfig = {
-  async headers() {
-    return [
-      {
-        source: '/_next/static/([^/]+/pages|chunks|runtime|css|fonts|media)/(.+)',
-        headers: [{key: 'Access-Control-Allow-Origin', value: '*'}],
-      },
-    ];
-  },
+  headers: [
+    {
+      source: '/_next/static/([^/]+/pages|chunks|runtime|css|fonts|media)/(.+)',
+      headers: [{key: 'Access-Control-Allow-Origin', value: '*'}],
+    },
+  ],
   publicRuntimeConfig: {
     assetPrefix: isProd ? 'https://docs.sentry.io' : undefined,
   },