diff --git a/SvgExport/Properties/AssemblyInfo.cs b/SvgExport/Properties/AssemblyInfo.cs
index d6f4201..44454fb 100644
--- a/SvgExport/Properties/AssemblyInfo.cs
+++ b/SvgExport/Properties/AssemblyInfo.cs
@@ -36,6 +36,7 @@
 // 2015-04-15 2015.0.0.0 Revit 2015
 // 2015-09-16 2016.0.0.1 flat migration to Revit 2016
 // 2020-07-17 2020.0.0.0 flat migration to Revit 2020
+// 2020-07-17 2021.0.0.0 flat migration to Revit 2021
 //
-[assembly: AssemblyVersion( "2020.0.0.0" )]
-[assembly: AssemblyFileVersion( "2020.0.0.0" )]
+[assembly: AssemblyVersion( "2021.0.0.0" )]
+[assembly: AssemblyFileVersion( "2021.0.0.0" )]
diff --git a/SvgExport/SvgExport.csproj b/SvgExport/SvgExport.csproj
index 400d08d..19b7ec8 100644
--- a/SvgExport/SvgExport.csproj
+++ b/SvgExport/SvgExport.csproj
@@ -17,7 +17,7 @@
     <OutputType>Library</OutputType>
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>SvgExport</RootNamespace>
-    <TargetFrameworkVersion>v4.7</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
@@ -45,12 +45,10 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="RevitAPI">
-      <HintPath>C:\Program Files\Autodesk\Revit 2020\RevitAPI.dll</HintPath>
-      <Private>False</Private>
+      <HintPath>C:\Program Files\Autodesk\Revit 2021\RevitAPI.dll</HintPath>
     </Reference>
     <Reference Include="RevitAPIUI">
-      <HintPath>C:\Program Files\Autodesk\Revit 2020\RevitAPIUI.dll</HintPath>
-      <Private>False</Private>
+      <HintPath>C:\Program Files\Autodesk\Revit 2021\RevitAPIUI.dll</HintPath>
     </Reference>
     <Reference Include="System" />
   </ItemGroup>
@@ -67,7 +65,7 @@
     <Delete Files="$(AppData)\Autodesk\REVIT\Addins\2015\SvgExport.dll" />
   </Target>
   <PropertyGroup>
-    <PostBuildEvent>copy "$(ProjectDir)SvgExport.addin" "$(AppData)\Autodesk\REVIT\Addins\2020"
-copy "$(ProjectDir)bin\debug\SvgExport.dll" "$(AppData)\Autodesk\REVIT\Addins\2020"</PostBuildEvent>
+    <PostBuildEvent>copy "$(ProjectDir)SvgExport.addin" "$(AppData)\Autodesk\REVIT\Addins\2021"
+copy "$(ProjectDir)bin\debug\SvgExport.dll" "$(AppData)\Autodesk\REVIT\Addins\2021"</PostBuildEvent>
   </PropertyGroup>
 </Project>
\ No newline at end of file