diff --git a/cs/OpenProtocol/OpenProtocol.csproj b/cs/OpenProtocol/OpenProtocol.csproj
index 2269da2..c0f4752 100644
--- a/cs/OpenProtocol/OpenProtocol.csproj
+++ b/cs/OpenProtocol/OpenProtocol.csproj
@@ -14,7 +14,7 @@
 
 	<ItemGroup>
 		<PackageReference Include="Microsoft.DotNet.Analyzers.Compatibility" Version="0.1.2-alpha" />
-		<PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+		<PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
 	</ItemGroup>
 
 </Project>