diff --git a/Dockerfile.railwayapp b/Dockerfile.railwayapp
index 7926835..3e9f120 100644
--- a/Dockerfile.railwayapp
+++ b/Dockerfile.railwayapp
@@ -11,6 +11,7 @@ ARG REDISHOST
 ARG REDISUSER
 ARG REDISPORT
 ARG REDISPASSWORD
+ARG DEBUG
 
 WORKDIR /build
 
diff --git a/src/app/worker.ts b/src/app/worker.ts
index 0d1d7b6..4b90c80 100644
--- a/src/app/worker.ts
+++ b/src/app/worker.ts
@@ -19,7 +19,7 @@ export class AppWorker implements IRunnable {
   }
 
   public run(): void {
-    const port = process.env.RELAY_PORT ?? process.env.PORT ?? 8008
+    const port = process.env.RELAY_PORT || process.env.PORT || 8008
     this.adapter.listen(typeof port === 'number' ? port : Number(port))
   }