diff --git a/FirebaseAuth/CHANGELOG.md b/FirebaseAuth/CHANGELOG.md
index 2b725886b45..c1dfc40947a 100644
--- a/FirebaseAuth/CHANGELOG.md
+++ b/FirebaseAuth/CHANGELOG.md
@@ -1,3 +1,6 @@
+# Unreleased
+- [fixed] Add a mechanism to prevent concurrent token refreshes. (#15474)
+
 # 12.2.0
 - [added] Added TOTP support for macOS.