diff --git a/backend/nginx/api.conf b/backend/nginx/api.conf
index 655ede3..459f755 100644
--- a/backend/nginx/api.conf
+++ b/backend/nginx/api.conf
@@ -20,7 +20,9 @@ server {
         proxy_buffering off;
         proxy_cache off;
         proxy_http_version 1.1;
-        proxy_set_header Connection '';
+        
+        # Update connection header handling
+        proxy_set_header Connection '';  # Keep this empty for HTTP/1.1 chunked transfer
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header Host $host;
@@ -38,6 +40,12 @@ server {
         # Keep connection alive
         keepalive_timeout 300s;
         keepalive_requests 1000;
+
+        # Add these new settings
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        proxy_read_timeout 86400s; # 24 hours - prevent timeout during long streams
+        client_max_body_size 10M;  # Increase if needed
     }
 
     # Return 444 for everything else (no response, just close connection)
@@ -52,6 +60,9 @@ server {
     include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
     ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
 
+    # Add this at the server level (outside location blocks)
+    client_header_timeout 300s;
+    client_body_timeout 300s;
 }
 server {
     if ($host = api.gitdiagram.com) {