diff --git a/src/THNETII.Acme.Client/THNETII.Acme.Client.csproj b/src/THNETII.Acme.Client/THNETII.Acme.Client.csproj
index 481a9a2..e1fb92b 100644
--- a/src/THNETII.Acme.Client/THNETII.Acme.Client.csproj
+++ b/src/THNETII.Acme.Client/THNETII.Acme.Client.csproj
@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
   <ItemGroup>