diff --git a/backend/src/nginx/diagnostic-ui.conf b/backend/src/nginx/diagnostic-ui.conf
index 8e7558ebf..a186c1b10 100644
--- a/backend/src/nginx/diagnostic-ui.conf
+++ b/backend/src/nginx/diagnostic-ui.conf
@@ -1,3 +1,9 @@
+
+map $http_upgrade $connection_upgrade {
+        default upgrade;
+        '' $http_connection;
+}
+
 server {
         listen 80 default_server;
         listen [::]:80 default_server;