diff --git a/v2rayN/v2rayN/Handler/SpeedtestHandler.cs b/v2rayN/v2rayN/Handler/SpeedtestHandler.cs
index cd36682d..f5d91ff1 100644
--- a/v2rayN/v2rayN/Handler/SpeedtestHandler.cs
+++ b/v2rayN/v2rayN/Handler/SpeedtestHandler.cs
@@ -15,7 +15,6 @@ namespace v2rayN.Handler
         private Config _config;
         private V2rayHandler _v2rayHandler;
         private List<int> _selecteds;
-        private Thread _workThread;
         Action<int, string> _updateFunc;
 
         private int testCounter = 0;
@@ -36,25 +35,19 @@ namespace v2rayN.Handler
 
             if (actionType == "ping")
             {
-                _workThread = new Thread(new ThreadStart(RunPing));
-                _workThread.IsBackground = true;
-                _workThread.Start();
+                Task.Factory.StartNew(() => RunPing());
             }
             if (actionType == "tcping")
             {
-                _workThread = new Thread(new ThreadStart(RunTcping));
-                _workThread.IsBackground = true;
-                _workThread.Start();
+                Task.Factory.StartNew(() => RunTcping());
             }
             else if (actionType == "realping")
             {
-                _workThread = new Thread(new ThreadStart(RunRealPing));
-                _workThread.IsBackground = true;
-                _workThread.Start();
+                Task.Factory.StartNew(() => RunRealPing());
             }
             else if (actionType == "speedtest")
             {
-                RunSpeedTest();
+                Task.Factory.StartNew(() => RunSpeedTest());
             }
         }
 
diff --git a/v2rayN/v2rayN/Handler/StatisticsHandler.cs b/v2rayN/v2rayN/Handler/StatisticsHandler.cs
index 8d5a3a24..7640faa3 100644
--- a/v2rayN/v2rayN/Handler/StatisticsHandler.cs
+++ b/v2rayN/v2rayN/Handler/StatisticsHandler.cs
@@ -5,6 +5,7 @@ using System.IO;
 using System.Net;
 using System.Net.Sockets;
 using System.Threading;
+using System.Threading.Tasks;
 using v2rayN.Mode;
 using v2rayN.Properties;
 using v2rayN.Protos.Statistics;
@@ -18,7 +19,6 @@ namespace v2rayN.Handler
         private ServerStatistics serverStatistics_;
         private Channel channel_;
         private StatsService.StatsServiceClient client_;
-        private Thread workThread_;
         private bool exitFlag_;
 
         Action<ulong, ulong, List<ServerStatItem>> updateFunc_;
@@ -70,9 +70,7 @@ namespace v2rayN.Handler
 
             GrpcInit();
 
-            workThread_ = new Thread(new ThreadStart(Run));
-            workThread_.IsBackground = true;
-            workThread_.Start();
+            Task.Factory.StartNew(() => Run());
         }
 
         private void GrpcInit()