diff --git a/src/ZB.MOM.WW.MxGateway.Worker/Bootstrap/WorkerOptions.cs b/src/ZB.MOM.WW.MxGateway.Worker/Bootstrap/WorkerOptions.cs
index 6f7ef3f..0a77e15 100644
--- a/src/ZB.MOM.WW.MxGateway.Worker/Bootstrap/WorkerOptions.cs
+++ b/src/ZB.MOM.WW.MxGateway.Worker/Bootstrap/WorkerOptions.cs
@@ -1,5 +1,6 @@
 namespace ZB.MOM.WW.MxGateway.Worker.Bootstrap;
 
+using System;
 using ZB.MOM.WW.MxGateway.Contracts;
 
 /// <summary>Worker bootstrap options passed via environment variables and named pipes.</summary>