diff --git a/StabilityMatrix.Avalonia/StabilityMatrix.Avalonia.csproj b/StabilityMatrix.Avalonia/StabilityMatrix.Avalonia.csproj
index 9fe17702..07665379 100644
--- a/StabilityMatrix.Avalonia/StabilityMatrix.Avalonia.csproj
+++ b/StabilityMatrix.Avalonia/StabilityMatrix.Avalonia.csproj
@@ -83,6 +83,7 @@
         <PackageReference Include="NLog" Version="5.2.8" />
         <PackageReference Include="NLog.Extensions.Logging" Version="5.3.8" />
         <PackageReference Include="NSubstitute" Version="5.1.0" />
+        <PackageReference Include="OneOf" Version="3.0.263" />
         <PackageReference Include="Polly" Version="8.2.1" />
         <PackageReference Include="Polly.Contrib.WaitAndRetry" Version="1.1.1" />
         <PackageReference Include="Polly.Extensions.Http" Version="3.0.0" />