Fix #571
diff --git a/release-notes/VERSION b/release-notes/VERSION
index 1b9c52e..9ec732b 100644
--- a/release-notes/VERSION
+++ b/release-notes/VERSION
@@ -27,6 +27,7 @@
 #560: @JsonCreator to deserialize BigInteger to Enum
  (requested by gisupp@github)
 #565: Add support for handling `Map.Entry`
+#571: Add support in ObjectMapper for custom `ObjectReader`, `ObjectWriter` (sub-classes)
 #572: Override default serialization of Enums
  (requested by herau@github)
 #576: Add fluent API for adding mixins