diff --git a/vite.config.ts b/vite.config.ts
index 81ff0535..615b93c5 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -18,13 +18,24 @@ export default defineConfig(({ mode }) => {
 
   return {
     build: {
-      chunkSizeWarningLimit: 900,
       outDir,
       rollupOptions: {
         input: {
-          main: resolve(__dirname, 'index.html'),
+          index: resolve(__dirname, 'index.html'),
           _scrivito_extensions: resolve(__dirname, '_scrivito_extensions.html'),
         },
+        output: {
+          manualChunks: {
+            react: [
+              'react-bootstrap',
+              'react-dropzone',
+              'react-helmet-async',
+              'react-toastify',
+            ],
+            scrivito: ['scrivito-neoletter-form-widgets'],
+            index: ['src/main.tsx', 'vite/modulepreload-polyfill'],
+          },
+        },
       },
     },
     define: {