diff --git a/tests/NSubstitute.Documentation.Tests.Generator/NSubstitute.Documentation.Tests.Generator.csproj b/tests/NSubstitute.Documentation.Tests.Generator/NSubstitute.Documentation.Tests.Generator.csproj
index 472e8646..e46d8874 100644
--- a/tests/NSubstitute.Documentation.Tests.Generator/NSubstitute.Documentation.Tests.Generator.csproj
+++ b/tests/NSubstitute.Documentation.Tests.Generator/NSubstitute.Documentation.Tests.Generator.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.0.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.6.0" PrivateAssets="all" />
   </ItemGroup>
 
 </Project>