diff --git a/Interop.nfapinet/Interop.nfapinet.csproj b/Interop.nfapinet/Interop.nfapinet.csproj
index 957724de..21202604 100644
--- a/Interop.nfapinet/Interop.nfapinet.csproj
+++ b/Interop.nfapinet/Interop.nfapinet.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net48</TargetFramework>
+        <TargetFramework>net5.0-windows7</TargetFramework>
         <LangVersion>latest</LangVersion>
         <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     </PropertyGroup>
diff --git a/Netch/Netch.csproj b/Netch/Netch.csproj
index 391fe08a..1b483784 100644
--- a/Netch/Netch.csproj
+++ b/Netch/Netch.csproj
@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <OutputType>WinExe</OutputType>
-        <TargetFramework>net48</TargetFramework>
+        <TargetFramework>net5.0-windows7</TargetFramework>
         <UseWindowsForms>true</UseWindowsForms>
         <UseWPF>true</UseWPF>
         <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
@@ -22,14 +22,12 @@
     <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
         <OutputPath>bin\x64\Debug\</OutputPath>
         <DefineConstants>DEBUG;TRACE</DefineConstants>
-        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
         <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
         <WarningsAsErrors />
         <NoWarn />
     </PropertyGroup>
 
     <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
         <NoWarn />
         <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
         <WarningsAsErrors />
diff --git a/SearchComboBox/SearchComboBox.csproj b/SearchComboBox/SearchComboBox.csproj
index a5e18a3f..0832ddae 100644
--- a/SearchComboBox/SearchComboBox.csproj
+++ b/SearchComboBox/SearchComboBox.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net48</TargetFramework>
+        <TargetFramework>net5.0-windows7</TargetFramework>
         <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
         <Platforms>AnyCPU</Platforms>
         <UseWindowsForms>true</UseWindowsForms>
diff --git a/UnitTest/UnitTest.csproj b/UnitTest/UnitTest.csproj
index 05a7f387..0412d9da 100644
--- a/UnitTest/UnitTest.csproj
+++ b/UnitTest/UnitTest.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net48</TargetFramework>
+        <TargetFramework>net5.0-windows7</TargetFramework>
         <Platforms>x64</Platforms>
         <UseWindowsForms>true</UseWindowsForms>
         <LangVersion>latest</LangVersion>