diff --git a/test/WebApiContrib.Formatting.ProtoBuf.Test/packages.config b/test/WebApiContrib.Formatting.ProtoBuf.Test/packages.config
index 9501e9a..079c0aa 100644
--- a/test/WebApiContrib.Formatting.ProtoBuf.Test/packages.config
+++ b/test/WebApiContrib.Formatting.ProtoBuf.Test/packages.config
@@ -2,7 +2,7 @@
 <packages>
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.7" targetFramework="net461" />
   <package id="Moq" version="4.2.1312.1622" targetFramework="net45" />
-  <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net461" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net461" />
   <package id="protobuf-net" version="3.0.29" targetFramework="net461" />
   <package id="protobuf-net.Core" version="3.0.29" targetFramework="net461" />
   <package id="System.Buffers" version="4.5.1" targetFramework="net461" />