diff --git a/src/DependencyInjection.CodeAnalysis/DependencyInjection.CodeAnalysis.csproj b/src/DependencyInjection.CodeAnalysis/DependencyInjection.CodeAnalysis.csproj
index 0e45956..5e84de5 100644
--- a/src/DependencyInjection.CodeAnalysis/DependencyInjection.CodeAnalysis.csproj
+++ b/src/DependencyInjection.CodeAnalysis/DependencyInjection.CodeAnalysis.csproj
@@ -15,7 +15,7 @@
   <ItemGroup>
     <PackageReference Include="NuGetizer" Version="1.4.9" />
     <PackageReference Include="Microsoft.Bcl.HashCode" Version="6.0.0" PrivateAssets="all" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.6.0" Pack="false" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" Pack="false" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.12" />
     <PackageReference Include="PolySharp" Version="1.16.0" PrivateAssets="all" />
     <PackageReference Include="ThisAssembly.Resources" Version="2.1.2" PrivateAssets="all" />
diff --git a/src/DependencyInjection.CodeFixes/DependencyInjection.CodeFixes.csproj b/src/DependencyInjection.CodeFixes/DependencyInjection.CodeFixes.csproj
index 721e612..841827a 100644
--- a/src/DependencyInjection.CodeFixes/DependencyInjection.CodeFixes.csproj
+++ b/src/DependencyInjection.CodeFixes/DependencyInjection.CodeFixes.csproj
@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="NuGetizer" Version="1.4.9" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.6.0" Pack="false" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" Pack="false" />
     <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common" Version="4.2.0" Pack="false" />
     <PackageReference Include="System.Composition.AttributedModel" Version="10.0.12" />
     <PackageReference Include="System.Composition.Hosting" Version="10.0.12" />