diff --git a/conf/nginx.conf b/conf/nginx.conf
index 67d7a3e..99f0b23 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -7,7 +7,7 @@
     }
     location ~ \.(js|png|css|woff2)$ {
         expires 1M;
-        add_header Cache-Control "public";
+        more_set_headers 'Cache-Control : public';
     }
     location /files {
         expires 1M;