Fixed #237
diff --git a/release-notes/VERSION b/release-notes/VERSION
index a2c8ac0..14a2330 100644
--- a/release-notes/VERSION
+++ b/release-notes/VERSION
@@ -3,6 +3,9 @@
New minor version.
+#237: Add `DeserializationFeature.FAIL_ON_READING_DUP_TREE_KEY` to optionally
+ throw `JsonMappingException` on duplicate keys, tree model (`JsonNode`)
+
------------------------------------------------------------------------
=== History: ===
------------------------------------------------------------------------