diff --git a/src/server.tsx b/src/server.tsx
index c456ca1..1331022 100644
--- a/src/server.tsx
+++ b/src/server.tsx
@@ -48,8 +48,12 @@ app.get("/js/:path{.+}", async c => {
 
 app.use("*", async (c, next) => {
     const url = new URL(c.req.url)
+    const localhost = url.hostname.endsWith("localhost")
     const domains = url.hostname.split(".")
-    const subdomain = domains.length > 1 ? domains[0]! : ""
+    let subdomain = ""
+
+    if (domains.length > (localhost ? 1 : 2))
+        subdomain = domains[0]!
 
     if (subdomain) {
         const app = serveApp(c, subdomain)