diff --git a/PersistentMapClient/PersistentMapClientTests/packages.config b/PersistentMapClient/PersistentMapClientTests/packages.config
index 0f36157..6d90f38 100644
--- a/PersistentMapClient/PersistentMapClientTests/packages.config
+++ b/PersistentMapClient/PersistentMapClientTests/packages.config
@@ -2,7 +2,7 @@
 <packages>
   <package id="MSTest.TestAdapter" version="1.3.2" targetFramework="net45" />
   <package id="MSTest.TestFramework" version="1.3.2" targetFramework="net45" />
-  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net45" />
   <package id="NUnit" version="3.11.0" targetFramework="net45" />
   <package id="NUnit.Console" version="3.9.0" targetFramework="net45" />
   <package id="NUnit.ConsoleRunner" version="3.9.0" targetFramework="net45" />