diff --git a/.github/workflows/build-test-lint.yml b/.github/workflows/build-test-lint.yml
index fd3d16cf..63fb1487 100644
--- a/.github/workflows/build-test-lint.yml
+++ b/.github/workflows/build-test-lint.yml
@@ -23,6 +23,11 @@ jobs:
               run: dotnet build
               working-directory: Xero-NetStandard
 
+            - name: Check for Outdated Packages
+              run: |
+                dotnet list package --outdated
+              working-directory: Xero-NetStandard
+
             # - name: Validate Lint
             #   run: dotnet format --verify-no-changes
             #   working-directory: Xero-NetStandard
diff --git a/Directory.Build.props b/Directory.Build.props
new file mode 100644
index 00000000..40b03f25
--- /dev/null
+++ b/Directory.Build.props
@@ -0,0 +1,5 @@
+<Project>
+  <PropertyGroup>
+    <WarningsAsErrors>NU1901,NU1902,NU1903,NU1904,NU1905</WarningsAsErrors>
+  </PropertyGroup>
+</Project>
diff --git a/Xero.NetStandard.OAuth2.Test/Xero.NetStandard.OAuth2.Test.csproj b/Xero.NetStandard.OAuth2.Test/Xero.NetStandard.OAuth2.Test.csproj
index dce0f22b..18683034 100644
--- a/Xero.NetStandard.OAuth2.Test/Xero.NetStandard.OAuth2.Test.csproj
+++ b/Xero.NetStandard.OAuth2.Test/Xero.NetStandard.OAuth2.Test.csproj
@@ -10,19 +10,19 @@
     <FileAlignment>512</FileAlignment>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="CompareNETObjects" Version="4.57.0" />
-    <PackageReference Include="JsonSubTypes" Version="1.5.2" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
-    <PackageReference Include="xunit" Version="2.4.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
-    <PackageReference Include="System.ComponentModel.Annotations" Version="4.5.0" />
+    <PackageReference Include="CompareNETObjects" Version="4.83.0" />
+    <PackageReference Include="JsonSubTypes" Version="2.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+    <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="*" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="3.1.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.1.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="3.1.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="3.1.0" />
-    <PackageReference Include="AutoBogus" Version="2.7.4" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="8.0.1" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="8.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.2" />
+    <PackageReference Include="AutoBogus" Version="2.13.1" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Xero.NetStandard.OAuth2\Xero.NetStandard.OAuth2.csproj">
diff --git a/Xero.NetStandard.OAuth2/Xero.NetStandard.OAuth2.csproj b/Xero.NetStandard.OAuth2/Xero.NetStandard.OAuth2.csproj
index 35be262e..05d1a240 100644
--- a/Xero.NetStandard.OAuth2/Xero.NetStandard.OAuth2.csproj
+++ b/Xero.NetStandard.OAuth2/Xero.NetStandard.OAuth2.csproj
@@ -27,10 +27,10 @@
   </PropertyGroup>
 
   <ItemGroup>
-      <PackageReference Include="CompareNETObjects" Version="4.57.0" />
-      <PackageReference Include="JsonSubTypes" Version="1.5.2" />
-      <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
-      <PackageReference Include="System.ComponentModel.Annotations" Version="4.5.0" />
+      <PackageReference Include="CompareNETObjects" Version="4.83.0" />
+      <PackageReference Include="JsonSubTypes" Version="2.0.1" />
+      <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+      <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
   </ItemGroup>
 
 
diff --git a/Xero.NetStandard.OAuth2Client/Xero.NetStandard.OAuth2Client.csproj b/Xero.NetStandard.OAuth2Client/Xero.NetStandard.OAuth2Client.csproj
index 4a859c5a..582dc6d4 100644
--- a/Xero.NetStandard.OAuth2Client/Xero.NetStandard.OAuth2Client.csproj
+++ b/Xero.NetStandard.OAuth2Client/Xero.NetStandard.OAuth2Client.csproj
@@ -13,8 +13,8 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="IdentityModel" Version="7.0.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
-    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="6.10.2" />
-    <PackageReference Include="System.Net.Http.Json" Version="5.0.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.1.0" />
+    <PackageReference Include="System.Net.Http.Json" Version="8.0.0" />
   </ItemGroup>
 </Project>