diff --git a/FastGithub.ReverseProxy/CertService.cs b/FastGithub.ReverseProxy/CertService.cs
index ef9b7cf..a12207d 100644
--- a/FastGithub.ReverseProxy/CertService.cs
+++ b/FastGithub.ReverseProxy/CertService.cs
@@ -1,4 +1,5 @@
-using Microsoft.Extensions.Caching.Memory;
+using FastGithub.Configuration;
+using Microsoft.Extensions.Caching.Memory;
 using Microsoft.Extensions.Logging;
 using System;
 using System.Collections.Generic;