diff --git a/back-end.js b/back-end.js
index 02457e5..1be278a 100644
--- a/back-end.js
+++ b/back-end.js
@@ -13,7 +13,7 @@ const { Server } = require('socket.io');
 const { instrument } = require("@socket.io/admin-ui");
 const io = new Server(server, {
     cors: {
-        origin: ["https://admin.socket.io"],
+        origin: ["https://admin.socket.io", "https://ptcgsim.online/"],
         credentials: true
     }
 });