diff --git a/Winterday.External.Gengo.Tests/packages.config b/Winterday.External.Gengo.Tests/packages.config
index 4a612ad..093dcd2 100644
--- a/Winterday.External.Gengo.Tests/packages.config
+++ b/Winterday.External.Gengo.Tests/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Newtonsoft.Json" version="6.0.1" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file