diff --git a/proxy/files/nginx.conf b/proxy/files/nginx.conf
index 8468701..7716084 100644
--- a/proxy/files/nginx.conf
+++ b/proxy/files/nginx.conf
@@ -33,6 +33,12 @@ http {
         "~(?<domain_name>[a-zA-Z0-9-]*)(\.[a-z]*)$" "$domain_name";
     }
     
+    # websocket upgrade mapping
+    map $http_upgrade $connection_upgrade {
+        default upgrade;
+        '' close;
+    }
+    
     server {
         listen 8080 default_server;