diff --git a/source/whats-new.txt b/source/whats-new.txt
index 8127cee9..b85aaa90 100644
--- a/source/whats-new.txt
+++ b/source/whats-new.txt
@@ -38,6 +38,12 @@ What's New in 5.5
    learn more about compatible versions of the server, see
    :ref:`kotlin-compatibility-tables`.
 
+The 5.5 driver release includes the following changes, fixes,
+and features:
+
+- Adds support for the ``connectTimeoutMS`` option when using the
+  default TLS transport layer. 
+
 .. _kotlin-coroutine-version-5.4:
 
 What's New in 5.4