diff --git a/memento-note/next.config.ts b/memento-note/next.config.ts
index 3947b9d..8c4358a 100644
--- a/memento-note/next.config.ts
+++ b/memento-note/next.config.ts
@@ -4,6 +4,10 @@ const nextConfig: NextConfig = {
   // Enable standalone output for Docker
   output: 'standalone',
 
+  // These server-side packages use Node.js internals (buffers, native modules, etc.)
+  // and must not be bundled by Turbopack — they are required directly by Node.js at runtime.
+  serverExternalPackages: ['pptxgenjs', 'dagre', 'elkjs'],
+
   // Serve dynamically uploaded files via API route (public/ is read-only in production)
   async rewrites() {
     return [