diff --git a/src/Twilio/TwiML/TwiML.cs b/src/Twilio/TwiML/TwiML.cs
index ec625992d..a7e59395c 100644
--- a/src/Twilio/TwiML/TwiML.cs
+++ b/src/Twilio/TwiML/TwiML.cs
@@ -16,15 +16,15 @@ public class TwiML
         /// <summary>
         /// Tag name
         /// </summary>
-        private string TagName { get; }
+        private string TagName { get; set; }
         /// <summary>
         /// Children elements
         /// </summary>
-        private List<TwiML> Children { get; }
+        private List<TwiML> Children { get; set; }
         /// <summary>
         /// Additional tag attributes to set on the generated xml
         /// </summary>
-        private List<KeyValuePair<string,string>> Options { get; }
+        private List<KeyValuePair<string,string>> Options { get; set; }
         /// <summary>
         /// Attribute names to be transformed on the generated xml
         /// </summary>