diff --git a/README.md b/README.md
index 312ec3f0..ca2961cd 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 ![DefaultEcs](https://github.com/Doraku/DefaultEcs/blob/master/DefaultEcsLogo.png)
 DefaultEcs is an Entity Component System framework which aims to be accessible with little constraints while retaining as much performance as possible for game development.
 
-[![NuGet](https://img.shields.io/badge/nuget-v0.6.2-brightgreen.svg)](https://www.nuget.org/packages/DefaultEcs)
+[![NuGet](https://img.shields.io/badge/nuget-v0.6.3-brightgreen.svg)](https://www.nuget.org/packages/DefaultEcs)
 
 - [Requirement](#Requirement)
 - [Overview](#Overview)
diff --git a/source/DefaultEcs.Benchmark/DefaultEcs.Benchmark.csproj b/source/DefaultEcs.Benchmark/DefaultEcs.Benchmark.csproj
index 45a2f163..4819f1e5 100644
--- a/source/DefaultEcs.Benchmark/DefaultEcs.Benchmark.csproj
+++ b/source/DefaultEcs.Benchmark/DefaultEcs.Benchmark.csproj
@@ -20,8 +20,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.11.1" />
-    <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.11.1" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.11.2" />
+    <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.11.2" />
     
     <!--<PackageReference Include="MonoGame.Extended.Entities" Version="1.1.0" />
     
diff --git a/source/DefaultEcs/DefaultEcs.csproj b/source/DefaultEcs/DefaultEcs.csproj
index 15588983..45d253e5 100644
--- a/source/DefaultEcs/DefaultEcs.csproj
+++ b/source/DefaultEcs/DefaultEcs.csproj
@@ -38,8 +38,9 @@
     <RepositoryType>git</RepositoryType>
     <PackageTags>gamedev game-development game-engine ecs entity-component-system</PackageTags>
 
-    <Version>0.6.2</Version>
+    <Version>0.6.3</Version>
     <PackageReleaseNotes>
+reduced cpu usage of multithreading SystemRunner when idling
     </PackageReleaseNotes>
   </PropertyGroup>
 </Project>
\ No newline at end of file
diff --git a/source/DefaultEcs/Technical/System/WorkerBarrier.cs b/source/DefaultEcs/Technical/System/WorkerBarrier.cs
index dac94f4b..a49f16ed 100644
--- a/source/DefaultEcs/Technical/System/WorkerBarrier.cs
+++ b/source/DefaultEcs/Technical/System/WorkerBarrier.cs
@@ -24,6 +24,9 @@ public WorkerBarrier(int workerCount)
             _count = workerCount;
             _endHandle = new ManualResetEvent(false);
             _startHandle = new ManualResetEvent(false);
+
+            _allStarted = false;
+            _runningCount = 0;
         }
 
         #endregion
@@ -33,7 +36,6 @@ public WorkerBarrier(int workerCount)
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void StartWorkers()
         {
-            Interlocked.Exchange(ref _runningCount, _count * 2);
             Volatile.Write(ref _allStarted, false);
             _startHandle.Set();
         }
@@ -43,7 +45,7 @@ public void Start()
         {
             _startHandle.WaitOne();
 
-            if (Interlocked.Decrement(ref _runningCount) == _count)
+            if (Interlocked.Increment(ref _runningCount) == _count)
             {
                 _startHandle.Reset();
                 Volatile.Write(ref _allStarted, true);