diff --git a/src/ARIEC60870.Master/ARIEC60870.Master.csproj b/src/ARIEC60870.Master/ARIEC60870.Master.csproj
index ca46782..556728d 100644
--- a/src/ARIEC60870.Master/ARIEC60870.Master.csproj
+++ b/src/ARIEC60870.Master/ARIEC60870.Master.csproj
@@ -9,6 +9,6 @@
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\ARIEC60870.Core\ARIEC60870.Core.csproj" />
-    <PackageReference Include="System.IO.Ports" Version="8.0.0" />
+    <PackageReference Include="System.IO.Ports" Version="10.0.9" />
   </ItemGroup>
 </Project>
diff --git a/tests/ARIEC60870.Repository.Tests/ARIEC60870.Repository.Tests.csproj b/tests/ARIEC60870.Repository.Tests/ARIEC60870.Repository.Tests.csproj
index c3f4a3e..923701a 100644
--- a/tests/ARIEC60870.Repository.Tests/ARIEC60870.Repository.Tests.csproj
+++ b/tests/ARIEC60870.Repository.Tests/ARIEC60870.Repository.Tests.csproj
@@ -10,9 +10,9 @@
     <Description>Repository-level public release hygiene tests for ARIEC60870.</Description>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
-    <PackageReference Include="xunit" Version="2.9.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>