diff --git a/nginx/files/proxy.conf b/nginx/files/proxy.conf
index 200e0a0..91e0a92 100644
--- a/nginx/files/proxy.conf
+++ b/nginx/files/proxy.conf
@@ -71,11 +71,11 @@
 
       proxy_http_version 1.1;
 
-      proxy_set_header Host $host;
+      proxy_set_header Host $host{% if site.host.port is defined and site.host.port not in [80,443] %}:{{ site.host.port }}{% endif %};
       proxy_set_header X-Real-IP $remote_addr;
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
       proxy_set_header X-Forwarded-Proto $scheme;
-      proxy_set_header X-Forwarded-Host $host:$server_port;
+      proxy_set_header X-Forwarded-Host $host{% if site.host.port is defined and site.host.port not in [80,443] %}:{{ site.host.port }}{% endif %};
       proxy_set_header X-Forwarded-Server $host;
       proxy_set_header X-Forwarded-Port $server_port;
       {%- if site.get('ssl', {'enabled': False}).get('enabled', False) %}