diff --git a/conf/nginx.conf b/conf/nginx.conf
index 82c54ad..378d433 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -19,6 +19,8 @@ location ^~ #LOCATION# {
   add_header X-Robots-Tag none;
   add_header X-Download-Options noopen;
   add_header X-Permitted-Cross-Domain-Policies none;
+  # Add data: to allow /ynhpanel.css to be load due to image on data:base64
+  more_set_headers Content-Security-Policy "default-src data:;";
 
   # Set max upload size
   client_max_body_size 10G;