diff --git a/client.ts b/client.ts
index 5cd5562..3a55ce2 100644
--- a/client.ts
+++ b/client.ts
@@ -1,8 +1,7 @@
 import { parseArgs } from "util";
 
-const serverUrl = `ws://localhost:1234?new`;
-
-async function main({ url }: { url: string }) {
+async function main({ url, domain }: { url: string; domain?: string }) {
+  const serverUrl = `ws://${domain || "localhost:1234"}?new`;
   const socket = new WebSocket(serverUrl);
 
   socket.addEventListener("message", (event) => {
@@ -35,9 +34,13 @@ const { values } = parseArgs({
       required: true,
       short: "p",
     },
+    domain: {
+      type: "string",
+      short: "d",
+    },
   },
   allowPositionals: true,
 });
 
 if (!values.port) throw "pass --port 3000";
-main({ url: `localhost:${values.port}` });
+main({ url: `localhost:${values.port}`, domain: values.domain });
diff --git a/server.ts b/server.ts
index c07a17f..4b33bb0 100644
--- a/server.ts
+++ b/server.ts
@@ -5,6 +5,8 @@ type Client = { id: string };
 
 const port = 1234;
 const protocol = "http";
+const domain = Bun.env.DOMAIN || `localhost:${port}`;
+console.log("domain:", domain);
 const clients = new Map<string, ServerWebSocket<Client>>();
 const clientData = new Map<string, any>();
 
@@ -60,7 +62,7 @@ serve<Client>({
       ws.send(
         JSON.stringify({
           id: ws.data.id,
-          url: `${protocol}://${ws.data.id}.localhost:${port}`,
+          url: `${protocol}://${ws.data.id}.${domain}`,
         })
       );
     },