diff --git a/PDFSign/PdfSign/packages.config b/PDFSign/PdfSign/packages.config
index b61f21b..d73ee8a 100644
--- a/PDFSign/PdfSign/packages.config
+++ b/PDFSign/PdfSign/packages.config
@@ -6,5 +6,5 @@
   <package id="Microsoft.IdentityModel.Clients.ActiveDirectory" version="3.14.1" targetFramework="net452" />
   <package id="Microsoft.Rest.ClientRuntime" version="2.3.8" targetFramework="net452" />
   <package id="Microsoft.Rest.ClientRuntime.Azure" version="3.3.7" targetFramework="net452" />
-  <package id="Newtonsoft.Json" version="6.0.8" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net452" />
 </packages>
\ No newline at end of file