diff --git a/Source/SchemaMapper.Tests/packages.config b/Source/SchemaMapper.Tests/packages.config
index 6c72d9b..9cafb85 100644
--- a/Source/SchemaMapper.Tests/packages.config
+++ b/Source/SchemaMapper.Tests/packages.config
@@ -2,6 +2,6 @@
 <packages>
   <package id="ICSharpCode.NRefactory" version="5.5.1" targetFramework="net40" />
   <package id="Mono.Cecil" version="0.9.6.4" targetFramework="net40" />
-  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net40" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net40" />
   <package id="NUnit" version="3.4.1" targetFramework="net40" />
 </packages>
\ No newline at end of file