--- a/Source/DafnyRuntime/DafnyRuntime.csproj.orig
+++ b/Source/DafnyRuntime/DafnyRuntime.csproj
@@ -6,7 +6,7 @@
       <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
       <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
       <DefineConstants>TRACE;ISDAFNYRUNTIMELIB</DefineConstants>
-      <TargetFrameworks>netstandard2.0;net452</TargetFrameworks>
+      <TargetFrameworks>net6.0</TargetFrameworks>
       <OutputPath>..\..\Binaries\</OutputPath>
       <LangVersion>7.3</LangVersion>
       <PackageLicenseExpression>MIT</PackageLicenseExpression>
--- a/Test/comp/separate-compilation/Inputs/producer/TimesTwo.csproj.orig
+++ b/Test/comp/separate-compilation/Inputs/producer/TimesTwo.csproj
@@ -2,7 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>netstandard2.0</TargetFramework>
+        <TargetFramework>net6.0</TargetFramework>
     </PropertyGroup>
 
     <ItemGroup>