diff --git a/frontend/nginx.conf b/frontend/nginx.conf
index d89e1a3..dc81a66 100644
--- a/frontend/nginx.conf
+++ b/frontend/nginx.conf
@@ -17,7 +17,8 @@ server {
     }
 
     location = /flintstones {
-        return 301 /flintstones/;
+        # Sin 301: Apache puede reescribir `Location` y exponer puerto interno (p. ej. :5173) y bucles.
+        rewrite ^ /flintstones/ last;
     }
 
     location ^~ /orcid2words/ {
@@ -26,7 +27,7 @@ server {
     }
 
     location = /orcid2words {
-        return 301 /orcid2words/;
+        rewrite ^ /orcid2words/ last;
     }
 
     location / {