diff --git a/src/Akka.DI.Unity.Tests/packages.config b/src/Akka.DI.Unity.Tests/packages.config
index 2565cb1..d1403dc 100644
--- a/src/Akka.DI.Unity.Tests/packages.config
+++ b/src/Akka.DI.Unity.Tests/packages.config
@@ -8,7 +8,7 @@
   <package id="CommonServiceLocator" version="1.3" targetFramework="net452" />
   <package id="Microsoft.NETCore.Platforms" version="1.1.0" targetFramework="net452" />
   <package id="NETStandard.Library" version="1.6.1" targetFramework="net452" />
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net452" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net452" />
   <package id="System.Collections" version="4.3.0" targetFramework="net452" />
   <package id="System.Collections.Concurrent" version="4.3.0" targetFramework="net452" />
   <package id="System.Collections.Immutable" version="1.3.1" targetFramework="net452" />