diff --git a/nginx/sites-available/zammad.itguys.com.br.conf b/nginx/sites-available/zammad.itguys.com.br.conf
index 7a7c697..6557ee4 100644
--- a/nginx/sites-available/zammad.itguys.com.br.conf
+++ b/nginx/sites-available/zammad.itguys.com.br.conf
@@ -120,6 +120,12 @@ server {
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_set_header X-Forwarded-Host $host;
+    proxy_buffering on; # Certifica que o buffering está ligado
+    proxy_buffer_size 128k; 
+    proxy_buffers 4 256k; # 4 buffers de 256KB cada.
+    proxy_busy_buffers_size 256k;
+    proxy_max_temp_file_size 0; # Desabilita a escrita em disco, forçando buffer na memória (se tiver RAM suficiente)
+    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
 
     # --- REGRAS DE ROTEAMENTO (LOCATIONS) ---