diff --git a/src/server/index.ts b/src/server/index.ts
index 992cd20..7628d67 100644
--- a/src/server/index.ts
+++ b/src/server/index.ts
@@ -23,4 +23,4 @@ app.use(async ctx => {
 
 const server = http.createServer(app.callback());
 
-server.listen(80);
+server.listen(process.env.PORT || 80);