diff --git a/src/SignRequest.Test/packages.config b/src/SignRequest.Test/packages.config
index ac390c1..68c1d56 100644
--- a/src/SignRequest.Test/packages.config
+++ b/src/SignRequest.Test/packages.config
@@ -2,6 +2,6 @@
 <packages>
   <package id="NUnit" version="2.6.4" targetFramework="net45" />
   <package id="RestSharp" version="105.1.0" targetFramework="net45" developmentDependency="true" />
-  <package id="Newtonsoft.Json" version="10.0.3" targetFramework="net45" developmentDependency="true" />
+  <package id="Newtonsoft.Json" version="13.0.2" targetFramework="net45" developmentDependency="true" />
   <package id="JsonSubTypes" version="1.2.0" targetFramework="net45" developmentDependency="true" />
 </packages>