diff --git a/release-notes/CREDITS-2.x b/release-notes/CREDITS-2.x
index 281c7322..d73de6fc 100644
--- a/release-notes/CREDITS-2.x
+++ b/release-notes/CREDITS-2.x
@@ -17,6 +17,9 @@ Contributors:
 
 # 2.16.0 (not yet released)
 
+kkurczewski
+* #689: Add KotlinDuration support
+
 WrongWrong (@k163377)
 * #687: Optimize and Refactor KotlinValueInstantiator.createFromObjectWith
 * #686: Add KotlinPropertyNameAsImplicitName option
diff --git a/release-notes/VERSION-2.x b/release-notes/VERSION-2.x
index f9372401..3ea73050 100644
--- a/release-notes/VERSION-2.x
+++ b/release-notes/VERSION-2.x
@@ -18,6 +18,8 @@ Co-maintainers:
 
 2.16.0 (not yet released)
 
+#689: Added UseJavaDurationConversion feature.
+ By enabling this feature and adding the Java Time module, Kotlin Duration can be handled in the same way as Java Duration.
 #687: Optimize and Refactor KotlinValueInstantiator.createFromObjectWith.
  This improves deserialization throughput about 1.3 ~ 1.5 times faster.
  https://github.com/FasterXML/jackson-module-kotlin/pull/687#issuecomment-1637365799