diff --git a/dotnet/RefererParser.Tests/RefererParser.Tests.csproj b/dotnet/RefererParser.Tests/RefererParser.Tests.csproj
index 47527529..cb1ed0bb 100644
--- a/dotnet/RefererParser.Tests/RefererParser.Tests.csproj
+++ b/dotnet/RefererParser.Tests/RefererParser.Tests.csproj
@@ -32,8 +32,9 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Newtonsoft.Json, Version=11.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed">
-      <HintPath>..\packages\Newtonsoft.Json.11.0.2\lib\net40\Newtonsoft.Json.dll</HintPath>
+    <Reference Include="Newtonsoft.Json, Version=13.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed">
+      <HintPath>..\packages\Newtonsoft.Json.13.0.1\lib\net40\Newtonsoft.Json.dll</HintPath>
+      <Private>True</Private>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
diff --git a/dotnet/RefererParser.Tests/packages.config b/dotnet/RefererParser.Tests/packages.config
index 59b2bef3..653bcc69 100644
--- a/dotnet/RefererParser.Tests/packages.config
+++ b/dotnet/RefererParser.Tests/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net40" />
+  <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net40" />
   <package id="xunit" version="1.9.1" targetFramework="net40" />
   <package id="YamlDotNet.Signed" version="4.3.1" targetFramework="net40" />
 </packages>
\ No newline at end of file