diff --git a/src/TunnelVisionLabs.LanguageTypes.SourceGenerator/TunnelVisionLabs.LanguageTypes.SourceGenerator.csproj b/src/TunnelVisionLabs.LanguageTypes.SourceGenerator/TunnelVisionLabs.LanguageTypes.SourceGenerator.csproj
index 6fdab46..0d8c77a 100644
--- a/src/TunnelVisionLabs.LanguageTypes.SourceGenerator/TunnelVisionLabs.LanguageTypes.SourceGenerator.csproj
+++ b/src/TunnelVisionLabs.LanguageTypes.SourceGenerator/TunnelVisionLabs.LanguageTypes.SourceGenerator.csproj
@@ -15,7 +15,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.0.1" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.5.0" PrivateAssets="all" />
   </ItemGroup>
 
   <Target Name="PackBuildOutputs" DependsOnTargets="ResolveProjectReferences;SatelliteDllsProjectOutputGroup;SatelliteDllsProjectOutputGroupDependencies">