diff --git a/conf/nginx.conf b/conf/nginx.conf
index 6ee6940..0e8a7d8 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -19,7 +19,7 @@ location __PATH__/ {
 }
 
 location /dns-query {
-  proxy_set_header Host $http_host;
+  proxy_set_header Host $host;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   proxy_redirect off;
   proxy_buffering on;