diff --git a/samples/EasyCron.Sample/Program.cs b/samples/EasyCron.Sample/Program.cs
index 280c22b..4c97323 100644
--- a/samples/EasyCron.Sample/Program.cs
+++ b/samples/EasyCron.Sample/Program.cs
@@ -1,11 +1,5 @@
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
 
 namespace EasyCron.Sample
 {