diff --git a/windows/WinUI/WinUI.csproj b/windows/WinUI/WinUI.csproj
index 76b4862ab..181983c09 100644
--- a/windows/WinUI/WinUI.csproj
+++ b/windows/WinUI/WinUI.csproj
@@ -66,8 +66,8 @@
   <PropertyGroup />
   <ItemGroup>
     <Reference Include="Accessibility" />
-    <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
-      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    <Reference Include="Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <HintPath>..\packages\Newtonsoft.Json.9.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="PresentationUI, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
diff --git a/windows/WinUI/packages.config b/windows/WinUI/packages.config
index 505e58836..e1fae9c6a 100644
--- a/windows/WinUI/packages.config
+++ b/windows/WinUI/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file