diff --git a/nginx.conf b/nginx.conf
index 2e57b6f4f..4ed8ff5aa 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";
 
 	location / {
 		proxy_pass http://localhost:5000/;