diff --git a/conf/nginx.conf b/conf/nginx.conf
index 4cfbe81..ac25ddf 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -37,5 +37,5 @@ location / {
 }
 
 location ~ ^/(proxy|media) {
-    more_set_headers "default-src 'none'; upgrade-insecure-requests; sandbox;";
+    more_set_headers "Content-Security-Policy : default-src 'none'; upgrade-insecure-requests; sandbox;";
 }