diff --git a/DIDemo/DIDemo.csproj b/DIDemo/DIDemo.csproj
index cd4ebfe..f1e3315 100644
--- a/DIDemo/DIDemo.csproj
+++ b/DIDemo/DIDemo.csproj
@@ -16,7 +16,7 @@
     <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="3.0.0" />
     <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.0.0" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.0.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.2" />
   </ItemGroup>