diff --git a/DIDemo/DIDemo.csproj b/DIDemo/DIDemo.csproj
index 0c3b90c..933f4d6 100644
--- a/DIDemo/DIDemo.csproj
+++ b/DIDemo/DIDemo.csproj
@@ -16,7 +16,7 @@
     <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="3.1.8" />
     <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.1.4" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.8" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.9" />
   </ItemGroup>