diff --git a/src/Termission.Core/Termission.Core.csproj b/src/Termission.Core/Termission.Core.csproj
index 670ecd8..94bdeb5 100644
--- a/src/Termission.Core/Termission.Core.csproj
+++ b/src/Termission.Core/Termission.Core.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 	
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net461</TargetFrameworks>
     <RootNamespace>Juniansoft.Termission.Core</RootNamespace>
     <Title>Termission</Title>
     <Copyright>Copyright © 2018</Copyright>
diff --git a/src/Termission.WinForms/Termission.WinForms.csproj b/src/Termission.WinForms/Termission.WinForms.csproj
index eecc6ef..4f4c5a5 100644
--- a/src/Termission.WinForms/Termission.WinForms.csproj
+++ b/src/Termission.WinForms/Termission.WinForms.csproj
@@ -21,7 +21,9 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\Termission.Core\Termission.Core.csproj" />
+    <ProjectReference Include="..\Termission.Core\Termission.Core.csproj">
+      <TargetFramework>net461</TargetFramework>
+    </ProjectReference>
     <ProjectReference Include="..\Termission.Core.Dotnet\Termission.Core.Dotnet.csproj" />
     <ProjectReference Include="..\Termission.EtoForms\Termission.EtoForms.csproj" />
   </ItemGroup>