diff --git a/.config/dotnet-tools.json b/.config/dotnet-tools.json
index 4761edbf..5b9035c7 100644
--- a/.config/dotnet-tools.json
+++ b/.config/dotnet-tools.json
@@ -17,11 +17,11 @@
       "rollForward": false
     },
     "docfx": {
-      "version": "2.80.1",
+      "version": "2.81.0",
       "commands": [
         "docfx"
       ],
       "rollForward": false
     }
   }
-}
+}
\ No newline at end of file
diff --git a/src/CStructSharp.Generators/CStructSharp.Generators.csproj b/src/CStructSharp.Generators/CStructSharp.Generators.csproj
index 927f56d8..07c227a2 100644
--- a/src/CStructSharp.Generators/CStructSharp.Generators.csproj
+++ b/src/CStructSharp.Generators/CStructSharp.Generators.csproj
@@ -20,9 +20,9 @@
   </PropertyGroup>
   <ItemGroup>
     <!-- Microsoft.CodeAnalysis 4.8 is the floor: Visual Studio 17.8 and .NET SDK 8. Newer hosts load it too. -->
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" PrivateAssets="all" />
-    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" PrivateAssets="all" />
-    <PackageReference Include="PolySharp" Version="1.15.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="5.9.0" PrivateAssets="all" />
+    <PackageReference Include="PolySharp" Version="1.16.0" PrivateAssets="all" />
   </ItemGroup>
   <ItemGroup>
     <AdditionalFiles Include="AnalyzerReleases.Shipped.md" />
diff --git a/tests/CStructSharp.Generators.Tests/CStructSharp.Generators.Tests.csproj b/tests/CStructSharp.Generators.Tests/CStructSharp.Generators.Tests.csproj
index db71187e..ae2c755a 100644
--- a/tests/CStructSharp.Generators.Tests/CStructSharp.Generators.Tests.csproj
+++ b/tests/CStructSharp.Generators.Tests/CStructSharp.Generators.Tests.csproj
@@ -8,11 +8,12 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="5.9.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.10.1" />
     <PackageReference Include="MSTest" Version="4.4.1" />
     <PackageReference Include="coverlet.msbuild" Version="10.0.1" PrivateAssets="all" />
     <!-- The same Roslyn the generator is built against, so the driver exercises the API surface consumers load. -->
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" />
   </ItemGroup>
 
   <ItemGroup>