diff --git a/conf/nginx.conf b/conf/nginx.conf
index 5c95f86..a1dfbf9 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -48,7 +48,7 @@
     location = __PATH__/srv/status {
       access_log off;
       log_not_found off;
-      proxy_set_header Host $http_host;
+      proxy_set_header Host $host;
       proxy_set_header X-Real-IP $remote_addr;
       proxy_set_header X-Request-Start "t=${msec}";
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
@@ -93,7 +93,7 @@
       #
       # proxy_set_header DOES NOT inherit, by design, we must repeat it,
       # otherwise headers are not set correctly
-      proxy_set_header Host $http_host;
+      proxy_set_header Host $host;
       proxy_set_header X-Real-IP $remote_addr;
       proxy_set_header X-Request-Start "t=${msec}";
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
@@ -125,7 +125,7 @@
     }
 
     location ~ ^/admin/backups/ {
-      proxy_set_header Host $http_host;
+      proxy_set_header Host $host;
       proxy_set_header X-Real-IP $remote_addr;
       proxy_set_header X-Request-Start "t=${msec}";
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
@@ -140,7 +140,7 @@
     # acceleration for backups and avatars
     # see note about repetition above
     location ~ ^/(letter_avatar/|user_avatar|highlight-js|stylesheets|favicon/proxied|service-worker) {
-      proxy_set_header Host $http_host;
+      proxy_set_header Host $host;
       proxy_set_header X-Real-IP $remote_addr;
       proxy_set_header X-Request-Start "t=${msec}";
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
@@ -183,7 +183,7 @@
     # we need buffering off for message bus
     location __PATH__/message-bus/ {
       proxy_set_header X-Request-Start "t=${msec}";
-      proxy_set_header Host $http_host;
+      proxy_set_header Host $host;
       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 https;
@@ -204,7 +204,7 @@
 
   location @__NAME__ {
     more_set_headers "Referrer-Policy : no-referrer-when-downgrade";
-    proxy_set_header Host $http_host;
+    proxy_set_header Host $host;
     proxy_set_header X-Request-Start "t=${msec}";
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;