diff --git a/nginx.conf.sigil b/nginx.conf.sigil
index aa224351..8de054e7 100644
--- a/nginx.conf.sigil
+++ b/nginx.conf.sigil
@@ -5,7 +5,7 @@
 {{ $upstream_port := index $port_map_list 2 }}
 
 map $http_origin $allow_origin {
-    ~^https?:\/\/((.*\.)?localhost:3000|discoursio-webapp(-(.*))?\.vercel\.app|(.*\.)?discours\.io)$ $http_origin;
+    ~^https?:\/\/((.*\.)?localhost(:\d+)?|discoursio-webapp(-(.*))?\.vercel\.app|(.*\.)?discours\.io)$ $http_origin;
     default "";
 }