diff --git a/DesktopBuild.bat b/DesktopBuild.bat
index 365fc74ce..1bbd09d5c 100644
--- a/DesktopBuild.bat
+++ b/DesktopBuild.bat
@@ -1,7 +1,14 @@
+@echo off
 set rootdir=%~dp0
 set debugbuildswitches=/p:WarningLevel=2 /nologo /v:n
 set releasebuildswitches=/p:Configuration=Release /p:WarningLevel=2 /nologo /v:n
-set msbuild=%PROGRAMFILES(X86)%\MSBuild\14.0\Bin\msbuild
+set msbuild=%PROGRAMFILES(X86)%\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\Bin\MSBuild.exe
+if not exist "%msbuild%" set msbuild=%PROGRAMFILES(X86)%\MSBuild\14.0\Bin\MSBuild.exe
+if not exist "%msbuild%" ( 
+echo *************** Please install the prerequisites to build VTS ***************
+pause
+exit
+)
 set EnableNuGetPackageRestore=true
 
 "%msbuild%" "%rootdir%\src\Vts.Desktop\Vts.Desktop.csproj" %debugbuildswitches%
diff --git a/src/Vts.Desktop.Test/Vts.Desktop.Test.csproj b/src/Vts.Desktop.Test/Vts.Desktop.Test.csproj
index 096a7942a..0fdd1d62c 100644
--- a/src/Vts.Desktop.Test/Vts.Desktop.Test.csproj
+++ b/src/Vts.Desktop.Test/Vts.Desktop.Test.csproj
@@ -64,16 +64,16 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="MathNet.Numerics, Version=4.4.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net40\MathNet.Numerics.dll</HintPath>
+      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net461\MathNet.Numerics.dll</HintPath>
     </Reference>
     <Reference Include="Meta.Numerics, Version=4.0.7.0, Culture=neutral, PublicKeyToken=67d25c65a6631347, processorArchitecture=MSIL">
       <HintPath>..\packages\Meta.Numerics.4.0.7\lib\netstandard1.1\Meta.Numerics.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=11.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
-      <HintPath>..\packages\Newtonsoft.Json.11.0.2\lib\net40\Newtonsoft.Json.dll</HintPath>
+      <HintPath>..\packages\Newtonsoft.Json.11.0.2\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
     <Reference Include="nunit.framework, Version=3.10.1.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
-      <HintPath>..\packages\NUnit.3.10.1\lib\net40\nunit.framework.dll</HintPath>
+      <HintPath>..\packages\NUnit.3.10.1\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core">
@@ -342,6 +342,7 @@
     </BootstrapperPackage>
   </ItemGroup>
   <ItemGroup>
+    <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
     <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
@@ -358,9 +359,6 @@
     <Content Include="App_Readme\MathNet.Numerics.copyright.txt" />
     <Content Include="App_Readme\MathNet.Numerics.readme.txt" />
   </ItemGroup>
-  <ItemGroup>
-    <None Include="packages.config" />
-  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <Import Project="$(SolutionDir)\.nuget\NuGet.targets" Condition="Exists('$(SolutionDir)\.nuget\NuGet.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
diff --git a/src/Vts.Desktop.Test/packages.config b/src/Vts.Desktop.Test/packages.config
index a6af48e18..63d484063 100644
--- a/src/Vts.Desktop.Test/packages.config
+++ b/src/Vts.Desktop.Test/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net40" requireReinstallation="true" />
+  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net461" />
   <package id="Meta.Numerics" version="4.0.7" targetFramework="net461" />
-  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net40" requireReinstallation="true" />
-  <package id="NUnit" version="3.10.1" targetFramework="net40" requireReinstallation="true" />
-  <package id="NUnit3TestAdapter" version="3.10.0" targetFramework="net40" />
+  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net461" />
+  <package id="NUnit" version="3.10.1" targetFramework="net461" />
+  <package id="NUnit3TestAdapter" version="3.10.0" targetFramework="net461" />
 </packages>
\ No newline at end of file
diff --git a/src/Vts.Desktop/Vts.Desktop.csproj b/src/Vts.Desktop/Vts.Desktop.csproj
index 770093129..a3773a065 100644
--- a/src/Vts.Desktop/Vts.Desktop.csproj
+++ b/src/Vts.Desktop/Vts.Desktop.csproj
@@ -68,14 +68,13 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="AutoMapper, Version=6.2.2.0, Culture=neutral, PublicKeyToken=be96cd2c38ef1005, processorArchitecture=MSIL">
-      <HintPath>..\packages\AutoMapper.6.2.2\lib\net40\AutoMapper.dll</HintPath>
-      <Private>True</Private>
+      <HintPath>..\packages\AutoMapper.6.2.2\lib\net45\AutoMapper.dll</HintPath>
     </Reference>
     <Reference Include="CommonServiceLocator, Version=2.0.3.0, Culture=neutral, PublicKeyToken=489b6accfaf20ef0, processorArchitecture=MSIL">
       <HintPath>..\packages\Unity.5.8.6\lib\net46\CommonServiceLocator.dll</HintPath>
     </Reference>
     <Reference Include="MathNet.Numerics, Version=4.4.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net40\MathNet.Numerics.dll</HintPath>
+      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net461\MathNet.Numerics.dll</HintPath>
     </Reference>
     <Reference Include="Meta.Numerics, Version=4.0.7.0, Culture=neutral, PublicKeyToken=67d25c65a6631347, processorArchitecture=MSIL">
       <HintPath>..\packages\Meta.Numerics.4.0.7\lib\netstandard1.1\Meta.Numerics.dll</HintPath>
@@ -83,10 +82,9 @@
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="MPFitLib, Version=1.1.1.0, Culture=neutral, PublicKeyToken=be1b3c0b5819660a, processorArchitecture=MSIL">
       <HintPath>..\packages\csmpfit.1.1.1\lib\net20\MPFitLib.dll</HintPath>
-      <Private>True</Private>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=11.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
-      <HintPath>..\packages\Newtonsoft.Json.11.0.2\lib\net40\Newtonsoft.Json.dll</HintPath>
+      <HintPath>..\packages\Newtonsoft.Json.11.0.2\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
     <Reference Include="NLog, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c, processorArchitecture=MSIL">
       <HintPath>..\packages\NLog.4.5.3\lib\net45\NLog.dll</HintPath>
@@ -99,18 +97,17 @@
     </Reference>
     <Reference Include="System.IO.Compression" />
     <Reference Include="System.Numerics" />
-    <Reference Include="System.Reactive.Core">
-      <HintPath>..\packages\Rx-Core.2.2.4\lib\net40\System.Reactive.Core.dll</HintPath>
+    <Reference Include="System.Reactive.Core, Version=2.2.4.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\Rx-Core.2.2.4\lib\net45\System.Reactive.Core.dll</HintPath>
     </Reference>
-    <Reference Include="System.Reactive.Interfaces">
-      <HintPath>..\packages\Rx-Interfaces.2.2.4\lib\net40\System.Reactive.Interfaces.dll</HintPath>
+    <Reference Include="System.Reactive.Interfaces, Version=2.2.4.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\Rx-Interfaces.2.2.4\lib\net45\System.Reactive.Interfaces.dll</HintPath>
     </Reference>
-    <Reference Include="System.Reactive.Linq">
-      <HintPath>..\packages\Rx-Linq.2.2.4\lib\net40\System.Reactive.Linq.dll</HintPath>
+    <Reference Include="System.Reactive.Linq, Version=2.2.4.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\Rx-Linq.2.2.4\lib\net45\System.Reactive.Linq.dll</HintPath>
     </Reference>
-    <Reference Include="System.Reactive.PlatformServices, Version=2.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Rx-PlatformServices.2.2.4\lib\net40\System.Reactive.PlatformServices.dll</HintPath>
+    <Reference Include="System.Reactive.PlatformServices, Version=2.2.4.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\Rx-PlatformServices.2.2.4\lib\net45\System.Reactive.PlatformServices.dll</HintPath>
     </Reference>
     <Reference Include="System.Runtime.Serialization">
       <RequiredTargetFramework>3.0</RequiredTargetFramework>
@@ -1208,7 +1205,6 @@
     <EmbeddedResource Include="..\Vts\Modeling\Resources\ReferenceData\N1e8mua0musp1g0p8dr0p2dt0p005\ROfFxAndTime">
       <Link>Modeling\Resources\ReferenceData\N1e8mua0musp1g0p8dr0p2dt0p005\ROfFxAndTime</Link>
     </EmbeddedResource>
-    <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
     <BootstrapperPackage Include="Microsoft.Net.Client.3.5">
@@ -1227,7 +1223,9 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
-  <ItemGroup />
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/src/Vts.Desktop/packages.config b/src/Vts.Desktop/packages.config
index 309c96532..ec71d7b07 100644
--- a/src/Vts.Desktop/packages.config
+++ b/src/Vts.Desktop/packages.config
@@ -1,15 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="AutoMapper" version="6.2.2" targetFramework="net40" requireReinstallation="true" />
-  <package id="csmpfit" version="1.1.1" targetFramework="net40" />
-  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net40" requireReinstallation="true" />
+  <package id="AutoMapper" version="6.2.2" targetFramework="net461" />
+  <package id="csmpfit" version="1.1.1" targetFramework="net461" />
+  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net461" />
   <package id="Meta.Numerics" version="4.0.7" targetFramework="net461" />
-  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net40" requireReinstallation="true" />
+  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net461" />
   <package id="NLog" version="4.5.3" targetFramework="net461" />
-  <package id="Rx-Core" version="2.2.4" targetFramework="net40" requireReinstallation="true" />
-  <package id="Rx-Interfaces" version="2.2.4" targetFramework="net40" requireReinstallation="true" />
-  <package id="Rx-Linq" version="2.2.4" targetFramework="net40" requireReinstallation="true" />
-  <package id="Rx-Main" version="2.2.2" targetFramework="net40" />
-  <package id="Rx-PlatformServices" version="2.2.4" targetFramework="net40" requireReinstallation="true" />
+  <package id="Rx-Core" version="2.2.4" targetFramework="net461" />
+  <package id="Rx-Interfaces" version="2.2.4" targetFramework="net461" />
+  <package id="Rx-Linq" version="2.2.4" targetFramework="net461" />
+  <package id="Rx-Main" version="2.2.2" targetFramework="net461" />
+  <package id="Rx-PlatformServices" version="2.2.4" targetFramework="net461" />
   <package id="Unity" version="5.8.6" targetFramework="net461" />
 </packages>
\ No newline at end of file
diff --git a/src/Vts.MGRTE.ConsoleApp/Vts.MGRTE.ConsoleApp.csproj b/src/Vts.MGRTE.ConsoleApp/Vts.MGRTE.ConsoleApp.csproj
index 321999108..3be334ee2 100644
--- a/src/Vts.MGRTE.ConsoleApp/Vts.MGRTE.ConsoleApp.csproj
+++ b/src/Vts.MGRTE.ConsoleApp/Vts.MGRTE.ConsoleApp.csproj
@@ -37,7 +37,7 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="MathNet.Numerics, Version=4.4.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net40\MathNet.Numerics.dll</HintPath>
+      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net461\MathNet.Numerics.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="NLog, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c, processorArchitecture=MSIL">
diff --git a/src/Vts.MGRTE.ConsoleApp/packages.config b/src/Vts.MGRTE.ConsoleApp/packages.config
index f36b30e4f..ec8f65e38 100644
--- a/src/Vts.MGRTE.ConsoleApp/packages.config
+++ b/src/Vts.MGRTE.ConsoleApp/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net40" requireReinstallation="true" />
+  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net461" />
   <package id="NLog" version="4.5.3" targetFramework="net461" />
 </packages>
\ No newline at end of file
diff --git a/src/Vts.MonteCarlo.CommandLineApplication.Test/Vts.MonteCarlo.CommandLineApplication.Test.csproj b/src/Vts.MonteCarlo.CommandLineApplication.Test/Vts.MonteCarlo.CommandLineApplication.Test.csproj
index 4bdabc914..b0ae8ac3b 100644
--- a/src/Vts.MonteCarlo.CommandLineApplication.Test/Vts.MonteCarlo.CommandLineApplication.Test.csproj
+++ b/src/Vts.MonteCarlo.CommandLineApplication.Test/Vts.MonteCarlo.CommandLineApplication.Test.csproj
@@ -40,10 +40,10 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="MathNet.Numerics, Version=4.4.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net40\MathNet.Numerics.dll</HintPath>
+      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net461\MathNet.Numerics.dll</HintPath>
     </Reference>
     <Reference Include="nunit.framework, Version=3.10.1.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
-      <HintPath>..\packages\NUnit.3.10.1\lib\net40\nunit.framework.dll</HintPath>
+      <HintPath>..\packages\NUnit.3.10.1\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
diff --git a/src/Vts.MonteCarlo.CommandLineApplication.Test/packages.config b/src/Vts.MonteCarlo.CommandLineApplication.Test/packages.config
index eb793e679..dfffec460 100644
--- a/src/Vts.MonteCarlo.CommandLineApplication.Test/packages.config
+++ b/src/Vts.MonteCarlo.CommandLineApplication.Test/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net40" requireReinstallation="true" />
-  <package id="NUnit" version="3.10.1" targetFramework="net40" requireReinstallation="true" />
+  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net461" />
+  <package id="NUnit" version="3.10.1" targetFramework="net461" />
 </packages>
\ No newline at end of file
diff --git a/src/Vts.MonteCarlo.CommandLineApplication/Vts.MonteCarlo.CommandLineApplication.csproj b/src/Vts.MonteCarlo.CommandLineApplication/Vts.MonteCarlo.CommandLineApplication.csproj
index fdb2ea9f6..4c0ea8e17 100644
--- a/src/Vts.MonteCarlo.CommandLineApplication/Vts.MonteCarlo.CommandLineApplication.csproj
+++ b/src/Vts.MonteCarlo.CommandLineApplication/Vts.MonteCarlo.CommandLineApplication.csproj
@@ -61,7 +61,7 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="MathNet.Numerics, Version=4.4.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net40\MathNet.Numerics.dll</HintPath>
+      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net461\MathNet.Numerics.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="NLog, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c, processorArchitecture=MSIL">
diff --git a/src/Vts.MonteCarlo.CommandLineApplication/packages.config b/src/Vts.MonteCarlo.CommandLineApplication/packages.config
index f36b30e4f..ec8f65e38 100644
--- a/src/Vts.MonteCarlo.CommandLineApplication/packages.config
+++ b/src/Vts.MonteCarlo.CommandLineApplication/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net40" requireReinstallation="true" />
+  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net461" />
   <package id="NLog" version="4.5.3" targetFramework="net461" />
 </packages>
\ No newline at end of file
diff --git a/src/Vts.MonteCarlo.PostProcessor.Test/Vts.MonteCarlo.PostProcessor.Test.csproj b/src/Vts.MonteCarlo.PostProcessor.Test/Vts.MonteCarlo.PostProcessor.Test.csproj
index 9136ec301..a769dd6e8 100644
--- a/src/Vts.MonteCarlo.PostProcessor.Test/Vts.MonteCarlo.PostProcessor.Test.csproj
+++ b/src/Vts.MonteCarlo.PostProcessor.Test/Vts.MonteCarlo.PostProcessor.Test.csproj
@@ -46,10 +46,10 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="MathNet.Numerics, Version=4.4.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net40\MathNet.Numerics.dll</HintPath>
+      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net461\MathNet.Numerics.dll</HintPath>
     </Reference>
     <Reference Include="nunit.framework, Version=3.10.1.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
-      <HintPath>..\packages\NUnit.3.10.1\lib\net40\nunit.framework.dll</HintPath>
+      <HintPath>..\packages\NUnit.3.10.1\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
diff --git a/src/Vts.MonteCarlo.PostProcessor.Test/packages.config b/src/Vts.MonteCarlo.PostProcessor.Test/packages.config
index eb793e679..dfffec460 100644
--- a/src/Vts.MonteCarlo.PostProcessor.Test/packages.config
+++ b/src/Vts.MonteCarlo.PostProcessor.Test/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net40" requireReinstallation="true" />
-  <package id="NUnit" version="3.10.1" targetFramework="net40" requireReinstallation="true" />
+  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net461" />
+  <package id="NUnit" version="3.10.1" targetFramework="net461" />
 </packages>
\ No newline at end of file
diff --git a/src/Vts.MonteCarlo.PostProcessor/Vts.MonteCarlo.PostProcessor.csproj b/src/Vts.MonteCarlo.PostProcessor/Vts.MonteCarlo.PostProcessor.csproj
index 2a1d42c03..ca2a72ffb 100644
--- a/src/Vts.MonteCarlo.PostProcessor/Vts.MonteCarlo.PostProcessor.csproj
+++ b/src/Vts.MonteCarlo.PostProcessor/Vts.MonteCarlo.PostProcessor.csproj
@@ -59,7 +59,7 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="MathNet.Numerics, Version=4.4.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net40\MathNet.Numerics.dll</HintPath>
+      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net461\MathNet.Numerics.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="NLog, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c, processorArchitecture=MSIL">
diff --git a/src/Vts.MonteCarlo.PostProcessor/packages.config b/src/Vts.MonteCarlo.PostProcessor/packages.config
index f36b30e4f..ec8f65e38 100644
--- a/src/Vts.MonteCarlo.PostProcessor/packages.config
+++ b/src/Vts.MonteCarlo.PostProcessor/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net40" requireReinstallation="true" />
+  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net461" />
   <package id="NLog" version="4.5.3" targetFramework="net461" />
 </packages>
\ No newline at end of file
diff --git a/src/Vts.ReportForwardSolvers.Desktop/Vts.ReportForwardSolvers.Desktop.csproj b/src/Vts.ReportForwardSolvers.Desktop/Vts.ReportForwardSolvers.Desktop.csproj
index 209876282..74026bebf 100644
--- a/src/Vts.ReportForwardSolvers.Desktop/Vts.ReportForwardSolvers.Desktop.csproj
+++ b/src/Vts.ReportForwardSolvers.Desktop/Vts.ReportForwardSolvers.Desktop.csproj
@@ -61,7 +61,7 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="MathNet.Numerics, Version=4.4.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net40\MathNet.Numerics.dll</HintPath>
+      <HintPath>..\packages\MathNet.Numerics.4.4.0\lib\net461\MathNet.Numerics.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core">
diff --git a/src/Vts.ReportForwardSolvers.Desktop/packages.config b/src/Vts.ReportForwardSolvers.Desktop/packages.config
index a0d8aa4f9..78d8e1c36 100644
--- a/src/Vts.ReportForwardSolvers.Desktop/packages.config
+++ b/src/Vts.ReportForwardSolvers.Desktop/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net40" requireReinstallation="true" />
+  <package id="MathNet.Numerics" version="4.4.0" targetFramework="net461" />
 </packages>
\ No newline at end of file
diff --git a/src/Vts.Test/Vts.Test.csproj b/src/Vts.Test/Vts.Test.csproj
index 4cd101243..630e0ba37 100644
--- a/src/Vts.Test/Vts.Test.csproj
+++ b/src/Vts.Test/Vts.Test.csproj
@@ -18,7 +18,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.2" />
     <PackageReference Include="NUnit" Version="3.10.1" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.10.0" />
   </ItemGroup>
diff --git a/src/Vts/Vts.csproj b/src/Vts/Vts.csproj
index 1e1f5981b..e10d936b3 100644
--- a/src/Vts/Vts.csproj
+++ b/src/Vts/Vts.csproj
@@ -100,10 +100,10 @@
     <PackageReference Include="AutoMapper" Version="6.2.2" />
     <PackageReference Include="CommonServiceLocator" Version="2.0.3" />
     <PackageReference Include="csmpfit" Version="1.1.1" />
-    <PackageReference Include="MathNet.Numerics" Version="4.4.0" />
+    <PackageReference Include="MathNet.Numerics" Version="4.4.1" />
     <PackageReference Include="Meta.Numerics" Version="4.0.7" />
     <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
-    <PackageReference Include="NLog" Version="4.5.3" />
+    <PackageReference Include="NLog" Version="4.5.4" />
     <PackageReference Include="System.Reactive" Version="4.0.0-preview00001" />
     <PackageReference Include="System.Reflection" Version="4.3.0" />
     <PackageReference Include="Unity" Version="5.8.6" />