diff --git a/.config/dotnet-tools.json b/.config/dotnet-tools.json
index 46bb80c..1ea8ba9 100644
--- a/.config/dotnet-tools.json
+++ b/.config/dotnet-tools.json
@@ -17,7 +17,7 @@
       "rollForward": false
     },
     "jetbrains.resharper.globaltools": {
-      "version": "2026.2.0.2",
+      "version": "2026.2.1",
       "commands": [
         "jb"
       ],
diff --git a/Directory.Packages.props b/Directory.Packages.props
index 5c8b579..9194596 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -5,7 +5,7 @@
   <ItemGroup>
     <!-- netstandard2.0 polyfill: provides IAsyncDisposable + ValueTask (in-box on net10.0). -->
     <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="10.0.11" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="5.6.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" />
     <PackageVersion Include="Microsoft.Extensions.Configuration.Binder" Version="10.0.11" />
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.11" />
     <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.11" />
@@ -13,7 +13,7 @@
     <PackageVersion Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3" />
     <!-- 3.3.0+ ships the .proto source generator inside protobuf-net.Core; the standalone
          protobuf-net.BuildTools package is redundant and loading both duplicates the generator. -->
-    <PackageVersion Include="protobuf-net" Version="3.3.8" />
+    <PackageVersion Include="protobuf-net" Version="3.3.21" />
     <PackageVersion Include="System.Text.Json" Version="10.0.11" />
     <!-- netstandard2.0: Channels is in-box on net10.0; ns2.0 needs the package. -->
     <PackageVersion Include="System.Threading.Channels" Version="10.0.11" />
@@ -24,17 +24,17 @@
     <!-- Analyzers -->
     <PackageVersion Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="10.0.400" />
     <PackageVersion Include="Microsoft.VisualStudio.Threading.Analyzers" Version="18.7.23" />
-    <PackageVersion Include="Roslynator.Analyzers" Version="4.16.0" />
-    <PackageVersion Include="Roslynator.Formatting.Analyzers" Version="4.16.0" />
+    <PackageVersion Include="Roslynator.Analyzers" Version="4.16.1" />
+    <PackageVersion Include="Roslynator.Formatting.Analyzers" Version="4.16.1" />
     <PackageVersion Include="SonarAnalyzer.CSharp" Version="10.32.0.713" />
   </ItemGroup>
   <ItemGroup>
     <!-- Test stack -->
     <PackageVersion Include="Microsoft.Extensions.Configuration" Version="10.0.11" />
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="10.0.11" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
     <PackageVersion Include="xunit" Version="2.9.3" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="4.0.0" />
     <PackageVersion Include="coverlet.collector" Version="10.0.1" />
   </ItemGroup>
   <ItemGroup>