diff --git a/packages/server/src/app.js b/packages/server/src/app.js
index 84f35cc0a2..3c1256f836 100644
--- a/packages/server/src/app.js
+++ b/packages/server/src/app.js
@@ -16,6 +16,7 @@ if (env.LOGGER !== "off") app.use(logger())
 app.use(api.routes())
 
 module.exports = async port => {
+  port = port || env.PORT || 4001
   const server = http.createServer(app.callback())
   return new Promise((resolve, reject) => {
     server.on("error", e => {
@@ -27,4 +28,4 @@ module.exports = async port => {
       resolve(server)
     })
   })
-}
\ No newline at end of file
+}