diff --git a/src/KArtSell.Host/Features/ShadowRun/Request.cs b/src/KArtSell.Host/Features/ShadowRun/Request.cs
index 8ede0b25..cc533bf7 100644
--- a/src/KArtSell.Host/Features/ShadowRun/Request.cs
+++ b/src/KArtSell.Host/Features/ShadowRun/Request.cs
@@ -5,12 +5,17 @@ namespace KArtSell.Host.Features.ShadowRun;
 /// <summary>
 /// Initiate a 252+ trading-day model validation run.
 /// </summary>
-public sealed record InitiateShadowRunRequest(
-    [property: JsonPropertyName("modelId")]
-    Guid ModelId,
-    [property: JsonPropertyName("windowStart")]
-    DateOnly WindowStart,
-    [property: JsonPropertyName("windowEnd")]
-    DateOnly WindowEnd,
-    [property: JsonPropertyName("phaseFilter")]
-    string PhaseFilter = "All");
+public sealed class InitiateShadowRunRequest
+{
+    [JsonPropertyName("modelId")]
+    public Guid ModelId { get; set; }
+
+    [JsonPropertyName("windowStart")]
+    public DateOnly WindowStart { get; set; }
+
+    [JsonPropertyName("windowEnd")]
+    public DateOnly WindowEnd { get; set; }
+
+    [JsonPropertyName("phaseFilter")]
+    public string PhaseFilter { get; set; } = "All";
+}