diff --git a/lib/arcadia_cloud_web/endpoint.ex b/lib/arcadia_cloud_web/endpoint.ex
index 9e352ce..280e411 100644
--- a/lib/arcadia_cloud_web/endpoint.ex
+++ b/lib/arcadia_cloud_web/endpoint.ex
@@ -48,7 +48,8 @@ defmodule ArcadiaCloudWeb.Endpoint do
 
   plug CORSPlug,
     origin: [
-      "http://localhost:5173",
+      # any localhost port — Vite dev servers hop ports when one is taken
+      ~r{^http://localhost:\d+$},
       ~r{^https://.*\.sky-ai\.com$}
     ]