diff --git a/website/nginx.conf b/website/nginx.conf
index 227ab9c..f4db7c9 100644
--- a/website/nginx.conf
+++ b/website/nginx.conf
@@ -42,8 +42,10 @@ http {
             access_log off;
         }
 
-        # Public folder assets
-        location ~* ^/(favicon\.ico|robots\.txt|sitemap\.xml|.*\.(png|jpg|jpeg|gif|webp|svg|ico|woff2?|ttf|otf))$ {
+        # Public folder assets. robots.txt and sitemap.xml are not files: Next.js
+        # generates them from app/robots.ts and app/sitemap.ts, so they go to
+        # the proxy below.
+        location ~* ^/(favicon\.ico|.*\.(png|jpg|jpeg|gif|webp|svg|ico|woff2?|ttf|otf))$ {
             root /app/public;
             expires 7d;
             add_header Cache-Control "public";