diff --git a/src/SpamGuard/SpamGuard.csproj b/src/SpamGuard/SpamGuard.csproj
index cae3836..e221b19 100644
--- a/src/SpamGuard/SpamGuard.csproj
+++ b/src/SpamGuard/SpamGuard.csproj
@@ -2,7 +2,8 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <UseWindowsForms>true</UseWindowsForms>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
diff --git a/tests/SpamGuard.Tests/SpamGuard.Tests.csproj b/tests/SpamGuard.Tests/SpamGuard.Tests.csproj
index 36b8b30..23f70d5 100644
--- a/tests/SpamGuard.Tests/SpamGuard.Tests.csproj
+++ b/tests/SpamGuard.Tests/SpamGuard.Tests.csproj
@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <UseWindowsForms>true</UseWindowsForms>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <IsPackable>false</IsPackable>