diff --git a/lang/csharp/Allonet/Allonet.csproj b/lang/csharp/Allonet/Allonet.csproj
index 09b3b63..c341ac1 100644
--- a/lang/csharp/Allonet/Allonet.csproj
+++ b/lang/csharp/Allonet/Allonet.csproj
@@ -8,7 +8,7 @@
   <ItemGroup>
     <PackageReference Include="MathNet.Numerics" Version="4.15.0" />
     <PackageReference Include="MathNet.Spatial" Version="0.6.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
 </Project>