diff --git a/src/SignhostAPIClient.Tests/SignhostAPIClient.Tests.csproj b/src/SignhostAPIClient.Tests/SignhostAPIClient.Tests.csproj
index ba90bba5..9e6a0472 100644
--- a/src/SignhostAPIClient.Tests/SignhostAPIClient.Tests.csproj
+++ b/src/SignhostAPIClient.Tests/SignhostAPIClient.Tests.csproj
@@ -9,7 +9,7 @@
   </ItemGroup>
   <ItemGroup Label="Package References">
     <PackageReference Include="FluentAssertions" Version="5.3.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="9.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="RichardSzalay.MockHttp" Version="1.5.*" />
     <PackageReference Include="xunit" Version="2.3.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.0" />
diff --git a/src/SignhostAPIClient/SignhostAPIClient.csproj b/src/SignhostAPIClient/SignhostAPIClient.csproj
index efb02237..ee1d6aa7 100644
--- a/src/SignhostAPIClient/SignhostAPIClient.csproj
+++ b/src/SignhostAPIClient/SignhostAPIClient.csproj
@@ -51,7 +51,7 @@
     <AdditionalFiles Include="../stylecop.json" />
   </ItemGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="Newtonsoft.Json" Version="9.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.0-beta008" PrivateAssets="All" />
   </ItemGroup>
   <ItemGroup Label=".NET 4.61 Package References" Condition="'$(TargetFramework)' == 'net462'">