diff --git a/RoslynRules/RoslynRules.csproj b/RoslynRules/RoslynRules.csproj
index 7223e60..53cec62 100644
--- a/RoslynRules/RoslynRules.csproj
+++ b/RoslynRules/RoslynRules.csproj
@@ -58,7 +58,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.6.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.11" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="10.0.400" PrivateAssets="all" />
     <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />