diff --git a/CHANGES.md b/CHANGES.md
index 48bd3f85fd..4f83cc5294 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -6,6 +6,10 @@ Version 6.0.0
 
 To be released.
 
+From this version Libplanet projects use .NET 8.0 as target framework.
+Therefore `BinaryFormatter` related methods are removed
+since it has been deprecated. See also: [.NET Document]
+
 Added new projects:
  -  Libplanet.Node
  -  Libplanet.Node.Executable
@@ -17,6 +21,8 @@ Libplanet-based nodes.
 
 ### Deprecated APIs
 
+ -  All classes became not to inherit `ISerializable` anymore.
+
 ### Backward-incompatible API changes
 
 ### Backward-incompatible network protocol changes
@@ -34,6 +40,9 @@ Libplanet-based nodes.
 ### CLI tools
 
 
+[.NET Document]: https://learn.microsoft.com/en-us/dotnet/core/compatibility/serialization/8.0/binaryformatter-disabled
+
+
 Previous version changes
 ------------------------