diff --git a/CSharp/WPF/Signer/packages.config b/CSharp/WPF/Signer/packages.config
index 1be656c6..f0c77f24 100644
--- a/CSharp/WPF/Signer/packages.config
+++ b/CSharp/WPF/Signer/packages.config
@@ -6,6 +6,6 @@
   <package id="Lacuna.RestPki.Client" version="1.12.0" targetFramework="net45" />
   <package id="MahApps.Metro" version="1.5.0" targetFramework="net462" />
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net461" />
-  <package id="Newtonsoft.Json" version="10.0.3" targetFramework="net461" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net461" />
   <package id="System.ComponentModel.Annotations" version="4.3.0" targetFramework="net462" />
 </packages>
\ No newline at end of file