diff --git a/frontend/next.config.ts b/frontend/next.config.ts
index 371c1a7..144e081 100644
--- a/frontend/next.config.ts
+++ b/frontend/next.config.ts
@@ -5,11 +5,12 @@ const nextConfig: NextConfig = {
   output: "standalone",
 
   // Experimental features
+  // Type assertion needed: proxyClientMaxBodySize is valid in Next.js 15 but types lag behind
   experimental: {
     // Increase proxy body size limit for file uploads (default is 10MB)
     // This allows larger files to be uploaded through the /api/* rewrite proxy to FastAPI
     proxyClientMaxBodySize: '100mb',
-  },
+  } as NextConfig['experimental'],
 
   // API Rewrites: Proxy /api/* requests to FastAPI backend
   // This simplifies reverse proxy configuration - users only need to proxy to port 8502