diff --git a/release-notes/CREDITS-2.x b/release-notes/CREDITS-2.x
index 9421e53..eca9622 100644
--- a/release-notes/CREDITS-2.x
+++ b/release-notes/CREDITS-2.x
@@ -44,3 +44,8 @@ Matt Nelson (mattnelson@github)
 
 * Suggested #28: Add delegating serializers for `JsonPatch` and `JsonMergePatch`
  (2.14.2)
+
+PJ Fanning (@pjfanning)
+
+* Contributed #31: Fix issue with `BigInteger` handling
+ (2.15.0)
diff --git a/release-notes/VERSION-2.x b/release-notes/VERSION-2.x
index a81355c..d2d7f1d 100644
--- a/release-notes/VERSION-2.x
+++ b/release-notes/VERSION-2.x
@@ -10,6 +10,9 @@ Modules:
 === Releases ===
 ------------------------------------------------------------------------
 
+#31: Fix issue with `BigInteger` handling
+ (contributed by @pjfanning)
+
 2.15.0-rc2 (28-Mar-2023)
 
 No changes since 2.14