diff --git a/CSharp/WPF/SignerAndPkiSdk/packages.config b/CSharp/WPF/SignerAndPkiSdk/packages.config
index e302f0cf..69906d8b 100644
--- a/CSharp/WPF/SignerAndPkiSdk/packages.config
+++ b/CSharp/WPF/SignerAndPkiSdk/packages.config
@@ -7,6 +7,6 @@
   <package id="Lacuna.RestPki.Api" version="1.13.0" targetFramework="net452" />
   <package id="Lacuna.RestPki.Client" version="1.12.0" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebApi.Client" version="5.0.0" targetFramework="net452" />
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net452" />
   <package id="Pkcs11Interop" version="4.0.0" targetFramework="net452" />
 </packages>
\ No newline at end of file