diff --git a/Directory.Packages.props b/Directory.Packages.props
index 8ee382b..ba28a75 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -32,7 +32,7 @@
          Do not add Workspaces.MSBuild to reach Depth of Inheritance / Class Coupling without
          reading the note on RoslynMetricsAnalyzer first - it drags in Microsoft.Build packages
          carrying high-severity advisories, and this solution builds with TreatWarningsAsErrors. -->
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.14.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" />
     <!-- UI Components -->
     <PackageVersion Include="Radzen.Blazor" Version="8.4.2" />
     <!-- Logging (Serilog) -->