diff --git a/docs/streams/upgrade-guide.html b/docs/streams/upgrade-guide.html
index f5c16c08cd2..46be969815a 100644
--- a/docs/streams/upgrade-guide.html
+++ b/docs/streams/upgrade-guide.html
@@ -79,7 +79,14 @@
         For users who have customized window store implementations on the above interface, they'd need to update their code to implement the newly added method as well.
         For more details, see <a href="https://cwiki.apache.org/confluence/display/KAFKA/KIP-261%3A+Add+Single+Value+Fetch+in+Window+Stores">KIP-261</a>.
     </p>
-    
+
+    <p>
+        We have added public <code>WindowedSerdes</code> to allow users to read from / write to a topic storing windowed table changelogs directly.
+        In addition, in <code>StreamsConfig</code> we have also added <code>default.windowed.key.serde.inner</code> and <code>default.windowed.value.serde.inner</code>
+        to let users specify inner serdes if the default serde classes are windowed serdes.
+        For more details, see <a href="https://cwiki.apache.org/confluence/display/KAFKA/KIP-265%3A+Make+Windowed+Serde+to+public+APIs">KIP-265</a>.
+    </p>
+
     <h3><a id="streams_api_changes_110" href="#streams_api_changes_110">Streams API changes in 1.1.0</a></h3>
     <p>
         We have added support for methods in <code>ReadOnlyWindowStore</code> which allows for querying <code>WindowStore</code>s without the necessity of providing keys.