diff --git a/BugsnagPerformance/Assets/BugsnagPerformance/Scripts/Models/SpanModel.cs b/BugsnagPerformance/Assets/BugsnagPerformance/Scripts/Models/SpanModel.cs
index e4b3281..ef603e7 100644
--- a/BugsnagPerformance/Assets/BugsnagPerformance/Scripts/Models/SpanModel.cs
+++ b/BugsnagPerformance/Assets/BugsnagPerformance/Scripts/Models/SpanModel.cs
@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System;
+using UnityEngine.Scripting;
 
 namespace BugsnagUnityPerformance
 {
@@ -112,7 +113,8 @@ private string GetNanoSeconds(DateTimeOffset time)
             return (duration.Ticks * 100).ToString();
         }
 
-         // This method tells Json.NET whether to serialize the droppedAttributesCount or not.
+        // This method tells Json.NET whether to serialize the droppedAttributesCount or not.
+        [Preserve]
         public bool ShouldSerializedroppedAttributesCount()
         {
             return droppedAttributesCount > 0;