diff --git a/src/JsonMergePatch.SourceGenerator/JsonMergePatch.SourceGenerator.csproj b/src/JsonMergePatch.SourceGenerator/JsonMergePatch.SourceGenerator.csproj
index 6637213..85a79fd 100644
--- a/src/JsonMergePatch.SourceGenerator/JsonMergePatch.SourceGenerator.csproj
+++ b/src/JsonMergePatch.SourceGenerator/JsonMergePatch.SourceGenerator.csproj
@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.1.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.2.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="$(MicrosoftCodeAnalysisAnalyzersVersion)" PrivateAssets="all" />
   </ItemGroup>
 
diff --git a/test/JsonMergePatch.SourceGenerator.Abstractions.Tests/JsonMergePatch.SourceGenerator.Tests.csproj b/test/JsonMergePatch.SourceGenerator.Abstractions.Tests/JsonMergePatch.SourceGenerator.Tests.csproj
index f3efa90..553404a 100644
--- a/test/JsonMergePatch.SourceGenerator.Abstractions.Tests/JsonMergePatch.SourceGenerator.Tests.csproj
+++ b/test/JsonMergePatch.SourceGenerator.Abstractions.Tests/JsonMergePatch.SourceGenerator.Tests.csproj
@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.1.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.2.0" />
     <PackageReference Include="Microsoft.Extensions.DependencyModel" Version="6.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0" />
     <PackageReference Include="NSubstitute" Version="4.3.0" />