diff --git a/Agent/Services/Updater.cs b/Agent/Services/Updater.cs
index f1c8e59b..0af15636 100644
--- a/Agent/Services/Updater.cs
+++ b/Agent/Services/Updater.cs
@@ -9,6 +9,7 @@ using System.Net;
 using System.Net.Http;
 using System.Threading.Tasks;
 using System.Linq;
+using System.Threading;
 
 namespace Remotely.Agent.Services
 {