diff --git a/conf/nginx.conf b/conf/nginx.conf
index 353bc76..d8a1a31 100755
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -7,7 +7,7 @@ location / {
 
   client_max_body_size 50M;
   proxy_pass http://127.0.0.1:__PORT__/;
-  proxy_set_header Connection "";
+  proxy_set_header Connection "upgrade";
   proxy_set_header Host $http_host;
   proxy_set_header X-Real-IP $remote_addr;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;