diff --git a/src/JustGiving.EventStore.Http.Client.Tests/packages.config b/src/JustGiving.EventStore.Http.Client.Tests/packages.config
index fe58273..75f14b6 100644
--- a/src/JustGiving.EventStore.Http.Client.Tests/packages.config
+++ b/src/JustGiving.EventStore.Http.Client.Tests/packages.config
@@ -6,6 +6,6 @@
   <package id="Microsoft.Bcl.Build" version="1.0.14" targetFramework="net451" />
   <package id="Microsoft.Net.Http" version="2.2.28" targetFramework="net45" />
   <package id="Moq" version="4.2.1502.0911" targetFramework="net45" />
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net45" />
   <package id="NUnit" version="2.6.4" targetFramework="net45" />
 </packages>
\ No newline at end of file