diff --git a/dotnet/src/webdriver/BiDi/BrowsingContext/SetViewportCommand.cs b/dotnet/src/webdriver/BiDi/BrowsingContext/SetViewportCommand.cs
index 781f68d3765cf..4edbda999829b 100644
--- a/dotnet/src/webdriver/BiDi/BrowsingContext/SetViewportCommand.cs
+++ b/dotnet/src/webdriver/BiDi/BrowsingContext/SetViewportCommand.cs
@@ -18,13 +18,14 @@
 // </copyright>
 
 using OpenQA.Selenium.BiDi.Communication;
+using System.Text.Json.Serialization;
 
 namespace OpenQA.Selenium.BiDi.BrowsingContext;
 
 internal sealed class SetViewportCommand(SetViewportParameters @params)
     : Command<SetViewportParameters, SetViewportResult>(@params, "browsingContext.setViewport");
 
-internal sealed record SetViewportParameters(BrowsingContext Context, Viewport? Viewport, double? DevicePixelRatio) : Parameters;
+internal sealed record SetViewportParameters(BrowsingContext Context, [property: JsonIgnore(Condition = JsonIgnoreCondition.Never)] Viewport? Viewport, double? DevicePixelRatio) : Parameters;
 
 public sealed class SetViewportOptions : CommandOptions
 {