diff --git a/nginx.conf b/nginx.conf
index 6a5b25a04..8ee72d0bb 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -4,7 +4,7 @@ server {
 	listen      80;
 	listen [::]:80;
 	proxy_set_header Host $http_host;
-	add_header Referrer-Policy same-origin;
+	add_header Referrer-Policy "same-origin";
 	add_header Strict-Transport-Security "max-age=3153600";
 	add_header X-Frame-Options "deny";