diff --git a/util/Setup/NginxConfigBuilder.cs b/util/Setup/NginxConfigBuilder.cs
index c7b96f4189..d46204c84b 100644
--- a/util/Setup/NginxConfigBuilder.cs
+++ b/util/Setup/NginxConfigBuilder.cs
@@ -178,6 +178,7 @@ server {{
 
   location /notifications/hub {{
     proxy_pass http://notifications:5000/;
+    proxy_set_header Upgrade $http_upgrade;
     proxy_set_header Connection $http_connection;
   }}