diff --git a/conf/nginx.conf b/conf/nginx.conf
index 9ac97f6..02d4d9e 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -11,6 +11,9 @@ location ^~ __PATH__/ {
   proxy_set_header Upgrade $http_upgrade;
   proxy_set_header Connection "Upgrade";
 
+  # Enable websockets (see: https://github.com/YunoHost-Apps/nodered_ynh/issues/78 )
+  more_set_headers "Content-Security-Policy : upgrade-insecure-requests; default-src https: data: blob: ; connect-src 'self' wss://$host; object-src https: data: 'unsafe-inline'; style-src https: data: 'unsafe-inline' ; script-src https: data: 'unsafe-inline' 'unsafe-eval'; worker-src 'self' blob:;";
+
   # Include SSOWAT user panel.
   include conf.d/yunohost_panel.conf.inc;
 }