diff --git a/resources/z9/dooris/nginx/dooris.ccchh.net.conf b/resources/z9/dooris/nginx/dooris.ccchh.net.conf
index 0d1baba..1d07fb5 100644
--- a/resources/z9/dooris/nginx/dooris.ccchh.net.conf
+++ b/resources/z9/dooris/nginx/dooris.ccchh.net.conf
@@ -26,7 +26,9 @@ server {
     # is transparent).
     # Also provide "_hidden" for by, since it's not relevant.
     proxy_set_header Forwarded "for=$remote_addr;proto=https;host=$host;by=_hidden";
-    proxy_intercept_errors off;
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
 
     location / {
         proxy_pass http://127.0.0.1:3000/;