diff --git a/src/Marvin.JsonPatch/Helpers/ConversionResult.cs b/src/Marvin.JsonPatch/Helpers/ConversionResult.cs
index d2114fb..8389e04 100644
--- a/src/Marvin.JsonPatch/Helpers/ConversionResult.cs
+++ b/src/Marvin.JsonPatch/Helpers/ConversionResult.cs
@@ -7,8 +7,8 @@ namespace Marvin.JsonPatch.Helpers
 {
     internal class ConversionResult
     {
-        public bool CanBeConverted { get; set; }
-        public object ConvertedInstance { get; set; }
+        public bool CanBeConverted { get; private set; }
+        public object ConvertedInstance { get; private set; }
 
 
         public ConversionResult(bool canBeConverted, object convertedInstance)