diff --git a/pyinfra_nginx/proxy_pass.nginx_config.j2 b/pyinfra_nginx/proxy_pass.nginx_config.j2
index f2968be..50b6e61 100644
--- a/pyinfra_nginx/proxy_pass.nginx_config.j2
+++ b/pyinfra_nginx/proxy_pass.nginx_config.j2
@@ -1,8 +1,9 @@
 server {
-	server_name {{ domain }};
-	client_max_body_size 512m;
+    server_name {{ domain }};
+    client_max_body_size 512m;
+    underscores_in_headers on;
 
-	location / {
+    location / {
         proxy_set_header    Host                $http_host;
         proxy_set_header    X-Real-IP           $remote_addr;
         proxy_set_header    X-Forwarded-For     $proxy_add_x_forwarded_for;