diff --git a/conf/endpoint.nginx.conf b/conf/endpoint.nginx.conf
index 3288035..2edb71e 100644
--- a/conf/endpoint.nginx.conf
+++ b/conf/endpoint.nginx.conf
@@ -9,5 +9,5 @@ location ~ ^(/_matrix|/_synapse/client) {
 
         proxy_http_version 1.1;
         
-        more_set_headers "Access-Control-Allow-Origin: __DOMAIN__";
+        more_set_headers "Access-Control-Allow-Origin: https://__DOMAIN__";
 }