diff --git a/sync.ts b/sync.ts
index 7d0503f..9fea22f 100644
--- a/sync.ts
+++ b/sync.ts
@@ -9,7 +9,7 @@ interface Session {
 	playing: boolean;
 }
 
-const sessions: {[name: string]: Session} = {};
+const sessions: { [name: string]: Session } = {};
 
 interface JoinPacket {
 	type: 'join';
@@ -40,8 +40,9 @@ const server = createServer(function (request, response) {
 	response.writeHead(404);
 	response.end();
 });
-server.listen(8181, function () {
-	console.log((new Date()) + ' Server is listening on port 8080');
+const port = process.env.PORT || 80;
+server.listen(port, function () {
+	console.log(`${(new Date())} Server is listening on port ${port}`);
 });
 
 const wsServer = new WebSocketServer({