diff --git a/Flyweight.Conceptual/Flyweight.Conceptual.csproj b/Flyweight.Conceptual/Flyweight.Conceptual.csproj
index 3bb526c..6323c52 100644
--- a/Flyweight.Conceptual/Flyweight.Conceptual.csproj
+++ b/Flyweight.Conceptual/Flyweight.Conceptual.csproj
@@ -4,6 +4,6 @@
     <TargetFramework>netcoreapp2.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
   </ItemGroup>
 </Project>
\ No newline at end of file