diff --git a/frontend/nginx.conf b/frontend/nginx.conf
index f8e3a0a..22f6169 100644
--- a/frontend/nginx.conf
+++ b/frontend/nginx.conf
@@ -9,9 +9,9 @@ server {
   location ^~ /api/ {
     proxy_pass http://schiri-backend:3000/;
     proxy_http_version 1.1;
-    proxy_set_header Upgrade $http_upgrade;
-    proxy_set_header Connection keep-alive;
     proxy_set_header Host $host;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
     proxy_cache_bypass $http_upgrade;
   }