diff --git a/OpenApiWithAzureFunctions/OpenApiWithAzureFunctions.csproj b/OpenApiWithAzureFunctions/OpenApiWithAzureFunctions.csproj
index aa7ef83..4e29b83 100644
--- a/OpenApiWithAzureFunctions/OpenApiWithAzureFunctions.csproj
+++ b/OpenApiWithAzureFunctions/OpenApiWithAzureFunctions.csproj
@@ -14,7 +14,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.1.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.5.0" />
   </ItemGroup>
 
   <ItemGroup>