diff --git a/build/targets/PackageVersions.props b/build/targets/PackageVersions.props
index 0ba3d7fcf23..889b7a80006 100644
--- a/build/targets/PackageVersions.props
+++ b/build/targets/PackageVersions.props
@@ -50,7 +50,7 @@
     <MicrosoftCompositionPackageVersion>1.0.30</MicrosoftCompositionPackageVersion>
     <MicrosoftMSXMLPackageVersion>8.0.0-alpha</MicrosoftMSXMLPackageVersion>
     <MicrosoftVisualFSharpMSBuild150PackageVersion>1.0.1</MicrosoftVisualFSharpMSBuild150PackageVersion>
-    <NewtonsoftJsonPackageVersion>10.0.2</NewtonsoftJsonPackageVersion>
+    <NewtonsoftJsonPackageVersion>9.0.1</NewtonsoftJsonPackageVersion>
     <NUnitPackageVersion>3.5.0</NUnitPackageVersion>
     <XliffTasksPackageVersion>0.2.0-beta-000081</XliffTasksPackageVersion>
 
diff --git a/packages.config b/packages.config
index ed756fd43ad..dc6205ef46c 100644
--- a/packages.config
+++ b/packages.config
@@ -34,7 +34,7 @@
   <package id="NUnit3TestAdapter" version="3.0.8-ctp-8" targetFramework="net45" />
   <package id="BenchmarkDotNet" version="0.9.8"/>
   <package id="BenchmarkDotNet.Diagnostics.Windows" version="0.9.8"/>
-  <package id="Newtonsoft.Json" version="8.0.1"/>
+  <package id="Newtonsoft.Json" version="9.0.1"/>
   <package id="Microsoft.FSharp.TupleSample" version="1.0.0-alpha-161121"/>
   <package id="Microsoft.VSSDK.BuildTools" version="15.1.192" />
 
diff --git a/tests/fsharpqa/testenv/src/AssemblyVersionCheck/AssemblyVersionCheck.fsx b/tests/fsharpqa/testenv/src/AssemblyVersionCheck/AssemblyVersionCheck.fsx
index 17621946c50..8554c7b46d2 100644
--- a/tests/fsharpqa/testenv/src/AssemblyVersionCheck/AssemblyVersionCheck.fsx
+++ b/tests/fsharpqa/testenv/src/AssemblyVersionCheck/AssemblyVersionCheck.fsx
@@ -1,7 +1,7 @@
 // Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
 
 // this was restored by packages.config in the root
-#r @"..\..\..\..\..\packages\Newtonsoft.Json.8.0.1\lib\net45\Newtonsoft.Json.dll"
+#r @"..\..\..\..\..\packages\Newtonsoft.Json.9.0.1\lib\net45\Newtonsoft.Json.dll"
 
 open System
 open System.Diagnostics