diff --git a/conf/nginx.conf b/conf/nginx.conf
index d348613..866fcc7 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -19,14 +19,14 @@ location / {
 }
 
 location ~ ^/(emoji|packs|system/accounts/avatars|system/media_attachments/files) {
-  add_header Cache-Control "public, max-age=31536000, immutable";
-  add_header Strict-Transport-Security "max-age=31536000";
+  more_set_headers "Cache-Control: public, max-age=31536000, immutable";
+  more_set_headers "Strict-Transport-Security: max-age=31536000";
   try_files $uri @proxy;
 }
 
 location /sw.js {
-  add_header Cache-Control "public, max-age=0";
-  add_header Strict-Transport-Security "max-age=31536000";
+  more_set_headers "Cache-Control: public, max-age=0";
+  more_set_headers "Strict-Transport-Security: max-age=31536000";
   try_files $uri @proxy;
 }
 
@@ -49,8 +49,8 @@ location @proxy {
   proxy_cache_valid 200 7d;
   proxy_cache_valid 410 24h;
   proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
-  add_header X-Cached $upstream_cache_status;
-  add_header Strict-Transport-Security "max-age=31536000";
+  more_set_headers "X-Cached: $upstream_cache_status";
+  more_set_headers "Strict-Transport-Security: max-age=31536000";
 
   tcp_nodelay on;
 }