diff --git a/vite.config.js b/vite.config.js
index 44da18d..4be432a 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -288,11 +288,21 @@ export default defineConfig({
     //    the build fails and tells you exactly which chunk overflowed.
     rollupOptions: {
       output: {
-        manualChunks: {
-          'transformers': ['@huggingface/transformers'],
-          'konva': ['konva', 'react-konva', 'use-image'],
-          'react-vendor': ['react', 'react-dom'],
-          'filerobot': ['react-filerobot-image-editor'],
+        // Rolldown (Vite 8) only accepts a function here — object form was Rollup-only.
+        manualChunks(id) {
+          const groups = [
+            ['transformers', '@huggingface/transformers'],
+            ['konva', 'konva', 'react-konva', 'use-image'],
+            ['react-vendor', 'react', 'react-dom'],
+            ['filerobot', 'react-filerobot-image-editor'],
+          ];
+          for (const [chunk, ...packages] of groups) {
+            for (const pkg of packages) {
+              if (id.includes(`node_modules/${pkg}/`) || id.includes(`node_modules/${pkg}\\`)) {
+                return chunk;
+              }
+            }
+          }
         },
       },
     },