diff --git a/Directory.Build.props b/Directory.Build.props
index e7f9438..4376381 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -29,7 +29,7 @@
 
   <ItemGroup>
     <!-- Roslynator - Code quality and refactoring -->
-    <PackageReference Include="Roslynator.Analyzers" Version="4.16.0">
+    <PackageReference Include="Roslynator.Analyzers" Version="4.16.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
@@ -53,7 +53,7 @@
     </PackageReference>
     
     <!-- Meziantou - Comprehensive code quality -->
-    <PackageReference Include="Meziantou.Analyzer" Version="3.0.151">
+    <PackageReference Include="Meziantou.Analyzer" Version="3.0.170">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
diff --git a/tests/Wolfgang.Extensions.Mail.Tests.Unit/Wolfgang.Extensions.Mail.Tests.Unit.csproj b/tests/Wolfgang.Extensions.Mail.Tests.Unit/Wolfgang.Extensions.Mail.Tests.Unit.csproj
index a60a907..e294eb1 100644
--- a/tests/Wolfgang.Extensions.Mail.Tests.Unit/Wolfgang.Extensions.Mail.Tests.Unit.csproj
+++ b/tests/Wolfgang.Extensions.Mail.Tests.Unit/Wolfgang.Extensions.Mail.Tests.Unit.csproj
@@ -19,7 +19,7 @@
        (needed to resolve the C# 14 extension members the library exposes) targets
        net8.0, and net8/9/10 is plenty to run a TFM-invariant doc check. -->
   <ItemGroup Condition="'$(TargetFramework)' == 'net8.0' OR '$(TargetFramework)' == 'net9.0' OR '$(TargetFramework)' == 'net10.0'">
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.6.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" />
   </ItemGroup>
 
   <!-- All TFMs: xunit v2 + coverlet -->