diff --git a/StatePrinter.Tests/Settings.StyleCop b/StatePrinter.Tests/Settings.StyleCop
index 45a7bbb..567939f 100644
--- a/StatePrinter.Tests/Settings.StyleCop
+++ b/StatePrinter.Tests/Settings.StyleCop
@@ -1,6 +1,6 @@
 <StyleCopSettings Version="105">
   <GlobalSettings>
-    <StringProperty Name="MergeSettingsFiles">Parent</StringProperty>
-    <BooleanProperty Name="ViolationsAsErrors">True</BooleanProperty>
+    <StringProperty Name="LinkedSettingsFile"></StringProperty>
+    <StringProperty Name="MergeSettingsFiles">Linked</StringProperty>
   </GlobalSettings>
 </StyleCopSettings>
\ No newline at end of file
diff --git a/StatePrinter.Tests/StatePrinter.Tests.csproj b/StatePrinter.Tests/StatePrinter.Tests.csproj
index 8cb88aa..5cce050 100644
--- a/StatePrinter.Tests/StatePrinter.Tests.csproj
+++ b/StatePrinter.Tests/StatePrinter.Tests.csproj
@@ -10,13 +10,15 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>StatePrinting.Tests</RootNamespace>
     <AssemblyName>StatePrinter.Tests</AssemblyName>
-    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\</SolutionDir>
     <RestorePackages>true</RestorePackages>
     <TargetFrameworkProfile />
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
+    <StyleCopOverrideSettingsFile>Settings.StyleCop</StyleCopOverrideSettingsFile>
+    <BuildToolsStyleCopVersion>4.7.44.0</BuildToolsStyleCopVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -29,19 +31,22 @@
     <Prefer32Bit>false</Prefer32Bit>
     <CodeAnalysisRuleSet>BasicCorrectnessRules.ruleset</CodeAnalysisRuleSet>
     <NoWarn>612 618</NoWarn>
+    <StyleCopEnabled>False</StyleCopEnabled>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
+    <DefineConstants>TRACE;CODE_ANALYSIS</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <Prefer32Bit>false</Prefer32Bit>
+    <StyleCopEnabled>True</StyleCopEnabled>
+    <StyleCopTreatErrorsAsWarnings>False</StyleCopTreatErrorsAsWarnings>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="nunit.framework, Version=3.11.0.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
-      <HintPath>..\packages\NUnit.3.11.0\lib\net35\nunit.framework.dll</HintPath>
+      <HintPath>..\packages\NUnit.3.11.0\lib\net45\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
@@ -111,6 +116,10 @@
     <Error Condition="!Exists('$(SolutionDir)\.nuget\NuGet.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\.nuget\NuGet.targets'))" />
     <Error Condition="!Exists('..\packages\NUnit.3.11.0\build\NUnit.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\NUnit.3.11.0\build\NUnit.props'))" />
   </Target>
+  <Import Project="..\packages\BuildTools.StyleCop.4.7.49.0\tools\StyleCop.targets" Condition="Exists('..\packages\BuildTools.StyleCop.4.7.49.0\tools\StyleCop.targets')" />
+  <Target Name="___packages_BuildTools_StyleCop_4_7_49_0_tools_StyleCop_targets" Condition="$(StyleCopOutputFile)==''" BeforeTargets="BeforeBuild">
+    <Error Text="BuildTools_StyleCop - the BuildTools_StyleCop package has not been restored.&#xD;&#xA;If you are running this from an IDE, make sure NuGet Package Restore has been enabled, then reload the solution and re-run the build.&#xD;&#xA;If you are running this from the command line, run the build again.&#xD;&#xA;If this is a CI server, you may want to make sure NuGet Package Restore runs before your build with:&#xD;&#xA;	msbuild solution.sln /t:restorepackages" />
+  </Target>
   <!-- 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.
   <Target Name="BeforeBuild">
diff --git a/StatePrinter.Tests/packages.config b/StatePrinter.Tests/packages.config
index 856ed62..f0fa85a 100644
--- a/StatePrinter.Tests/packages.config
+++ b/StatePrinter.Tests/packages.config
@@ -1,14 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="BuildTools.StyleCop" version="4.7.49.0" targetFramework="net35" />
-  <package id="coveralls.io" version="1.1.86" />
-  <package id="NUnit" version="3.11.0" targetFramework="net35" />
-  <package id="NUnit.ConsoleRunner" version="3.9.0" targetFramework="net35" />
-  <package id="NUnit.Extension.NUnitProjectLoader" version="3.6.0" targetFramework="net35" />
-  <package id="NUnit.Extension.NUnitV2Driver" version="3.7.0" targetFramework="net35" />
-  <package id="NUnit.Extension.NUnitV2ResultWriter" version="3.6.0" targetFramework="net35" />
-  <package id="NUnit.Extension.TeamCityEventListener" version="1.0.3" targetFramework="net35" />
-  <package id="NUnit.Extension.VSProjectLoader" version="3.8.0" targetFramework="net35" />
-  <package id="NUnit.Runners" version="3.9.0" targetFramework="net35" />
-  <package id="OpenCover" version="4.5.3522" />
+  <package id="BuildTools.StyleCop" version="4.7.49.0" targetFramework="net461" />
+  <package id="coveralls.io" version="1.1.86" targetFramework="net461" />
+  <package id="NUnit" version="3.11.0" targetFramework="net461" />
+  <package id="NUnit.ConsoleRunner" version="3.9.0" targetFramework="net461" />
+  <package id="NUnit.Extension.NUnitProjectLoader" version="3.6.0" targetFramework="net461" />
+  <package id="NUnit.Extension.NUnitV2Driver" version="3.7.0" targetFramework="net461" />
+  <package id="NUnit.Extension.NUnitV2ResultWriter" version="3.6.0" targetFramework="net461" />
+  <package id="NUnit.Extension.TeamCityEventListener" version="1.0.3" targetFramework="net461" />
+  <package id="NUnit.Extension.VSProjectLoader" version="3.8.0" targetFramework="net461" />
+  <package id="NUnit.Runners" version="3.9.0" targetFramework="net461" />
+  <package id="OpenCover" version="4.6.519" targetFramework="net461" />
 </packages>
\ No newline at end of file
diff --git a/StatePrinter/StatePrinter.csproj b/StatePrinter/StatePrinter.csproj
index 1d06ca2..c19a895 100644
--- a/StatePrinter/StatePrinter.csproj
+++ b/StatePrinter/StatePrinter.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>StatePrinting</RootNamespace>
     <AssemblyName>StatePrinter</AssemblyName>
-    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile />
     <StyleCopTreatErrorsAsWarnings>false</StyleCopTreatErrorsAsWarnings>
@@ -28,6 +28,7 @@
     <CodeAnalysisRuleSet>BasicCorrectnessRules.ruleset</CodeAnalysisRuleSet>
     <CodeAnalysisIgnoreGeneratedCode>false</CodeAnalysisIgnoreGeneratedCode>
     <StyleCopTreatErrorsAsWarnings>false</StyleCopTreatErrorsAsWarnings>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -37,6 +38,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup>
     <ApplicationIcon>gfx\stateprinter.ico</ApplicationIcon>
diff --git a/appveyor.yml b/appveyor.yml
index 2f9157a..f7073d0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,7 +14,7 @@ build:
 
 
 after_test: 
-    - packages\OpenCover.4.5.3522\OpenCover.Console.exe -register:user -filter:"+[StatePrinter]*" -target:"packages\NUnit.Runners.2.6.4\tools\nunit-console.exe" -targetargs:"StatePrinter.Tests\bin\debug\StatePrinter.Tests.dll /domain:single /noshadow" -output:"coverage.xml"
+    - packages\OpenCover.4.6.519\tools\OpenCover.Console.exe -register:user -filter:"+[StatePrinter]*" -target:"packages\NUnit.ConsoleRunner.3.9.0\tools\nunit3-console.exe" -targetargs:"StatePrinter.Tests\bin\debug\StatePrinter.Tests.dll /domain:single" -output:"coverage.xml"
 
     - packages\coveralls.io.1.1.86\tools\coveralls.net.exe --opencover "coverage.xml"