diff --git a/apps/infra/net/nginx/helmchart.yaml b/apps/infra/net/nginx/helmchart.yaml
index 98b9624..803e742 100644
--- a/apps/infra/net/nginx/helmchart.yaml
+++ b/apps/infra/net/nginx/helmchart.yaml
@@ -68,6 +68,7 @@ spec:
           "http_user_agent": "$http_user_agent",
           "http_x_forwarded_for": "$http_x_forwarded_for",
           "http_host": "$http_host",
+          "http_upgrade": "$http_upgrade",
           "server_name": "$server_name",
           "request_time": "$request_time",
           "upstream": "$upstream_addr",