diff --git a/XmlSchemaClassGenerator.Tests/XmlSchemaClassGenerator.Tests.csproj b/XmlSchemaClassGenerator.Tests/XmlSchemaClassGenerator.Tests.csproj
index bfc12ee0..874bd5ef 100644
--- a/XmlSchemaClassGenerator.Tests/XmlSchemaClassGenerator.Tests.csproj
+++ b/XmlSchemaClassGenerator.Tests/XmlSchemaClassGenerator.Tests.csproj
@@ -24,7 +24,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Glob.cs" Version="5.1.766" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.11.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.0.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
     <PackageReference Include="System.CodeDom" Version="6.0.0" />
     <PackageReference Include="System.Text.Encoding.CodePages" Version="6.0.0" />