diff --git a/EnvelopeGenerator.Web/Models/Annotation.cs b/EnvelopeGenerator.Web/Models/Annotation.cs
index e909eddf..b4774cb1 100644
--- a/EnvelopeGenerator.Web/Models/Annotation.cs
+++ b/EnvelopeGenerator.Web/Models/Annotation.cs
@@ -7,8 +7,10 @@ public record Annotation
     public required string Name { get; init; }
 
     #region Bound Annotation
+    [JsonIgnore]
     public string? HorBoundAnnotName { get; init; }
 
+    [JsonIgnore]
     public string? VerBoundAnnotName { get; init; }
     #endregion
 
@@ -20,13 +22,15 @@ public record Annotation
     internal double _width = default;
 
     internal double _height = default;
-      
+
+    [JsonIgnore]
     public double MarginLeft
     {
         get => _marginLeft;
         init => _marginLeft = value;
     }
 
+    [JsonIgnore]
     public double MarginTop
     {
         get => _marginTop;
@@ -53,8 +57,10 @@ public record Annotation
     #endregion
 
     #region Boundary
+    [JsonIgnore]
     public double HorBoundary => MarginLeft + Width;
 
+    [JsonIgnore]
     public double VerBoundary => MarginTop + Height;
     #endregion