diff --git a/LibreMetaverse.StructuredData/JSON/JsonException.cs b/LibreMetaverse.StructuredData/JSON/JsonException.cs
index d99593b2..38f695b5 100644
--- a/LibreMetaverse.StructuredData/JSON/JsonException.cs
+++ b/LibreMetaverse.StructuredData/JSON/JsonException.cs
@@ -14,6 +14,7 @@ using System;
 
 namespace LitJson
 {
+    [Serializable]
     public class JsonException : ApplicationException
     {
         public JsonException () : base ()
diff --git a/LibreMetaverse.StructuredData/StructuredData.cs b/LibreMetaverse.StructuredData/StructuredData.cs
index 94b0d9f8..e9e1ac63 100644
--- a/LibreMetaverse.StructuredData/StructuredData.cs
+++ b/LibreMetaverse.StructuredData/StructuredData.cs
@@ -72,6 +72,7 @@ namespace OpenMetaverse.StructuredData
     /// <summary>
     /// 
     /// </summary>
+    [Serializable]
     public class OSDException : Exception
     {
         public OSDException(string message) : base(message) { }
diff --git a/Programs/VoiceTest/VoiceTest.cs b/Programs/VoiceTest/VoiceTest.cs
index 93fda74b..041cf0ba 100644
--- a/Programs/VoiceTest/VoiceTest.cs
+++ b/Programs/VoiceTest/VoiceTest.cs
@@ -32,6 +32,7 @@ using OpenMetaverse.Utilities;
 
 namespace VoiceTest
 {
+    [Serializable]
     public class VoiceException: Exception
     {
         public bool LoggedIn = false;
diff --git a/Programs/examples/TestClient/Program.cs b/Programs/examples/TestClient/Program.cs
index d15133e9..bd35aaf9 100644
--- a/Programs/examples/TestClient/Program.cs
+++ b/Programs/examples/TestClient/Program.cs
@@ -5,6 +5,7 @@ using CommandLine.Utility;
 
 namespace OpenMetaverse.TestClient
 {
+    [Serializable]
     public class CommandLineArgumentsException : Exception
     {
     }