Bigtop 3.1.1 release.
diff --git a/CHANGES.txt b/CHANGES.txt
index e1fdc03..1a57e11 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -15,6 +15,31 @@
 
 Bigtop Changelog
 
+* Release 3.1.1 (2022-07-23)
+
+Release Notes - Bigtop - Version 3.1.1
+
+** Bug
+    * [BIGTOP-3712] - Kafka smoke test failed with Zookeeper built with maven
+    * [BIGTOP-3714] - Fix error of DataNode httpserver due to conflicting dependency on Netty in branch-3.1
+    * [BIGTOP-3724] - Increment the release number of ZooKeeper and Kafka
+    * [BIGTOP-3725] - Puppet 3 is removed from EPEL for CentOS 7
+    * [BIGTOP-3733] - Building Logstash fails on Rocky 8
+    * [BIGTOP-3735] - Sqoop bin script doesn't work on Bigtop-3.1.0
+    * [BIGTOP-3747] - Zeppelin RPM package is missing notebookrepo-filesystem-0.10.0.jar
+    * [BIGTOP-3751] - Fix build failure of Zeppelin due to dependency convergence error
+
+** New Feature
+    * [BIGTOP-3736] - Bump Hadoop to 3.2.4 in branch-3.1
+
+** Improvement
+    * [BIGTOP-3669] - Use maven instead of ant to build ZooKeeper
+    * [BIGTOP-3715] - Add TestWebHDFS to smoke-tests
+
+** Task
+    * [BIGTOP-3742] - Add tez.tar.gz tarball in tez.rpm
+
+
 * Release 3.1.0 (2022-05-17)
 
 Release Notes - Bigtop - Version 3.1.0
@@ -88,7 +113,6 @@
     * [BIGTOP-3658] - Add Fedora 35 support and drop 33
 
 ** Task
-    * [BIGTOP-3586] - Upgrade Bigtop-ambari-mpack to support Ambari 2.7.5 and Hadoop3.x in BIGTOP-3.0 release
     * [BIGTOP-3590] - Hbase smoke tests failed on Ubuntu 20.04
     * [BIGTOP-3591] - Upgrading Bigtop-Mpack services deploying scripts aligned to Ambari-2.7.5
     * [BIGTOP-3592] - Remove Ambari stack-select tool dependency from stack hooks
diff --git a/src/site/xdoc/release-notes.xml b/src/site/xdoc/release-notes.xml
index 4f1b86c..5f93e13 100644
--- a/src/site/xdoc/release-notes.xml
+++ b/src/site/xdoc/release-notes.xml
@@ -17,6 +17,52 @@
 		<section name="Bigtop Project Release Notes">
 			<!-- Paste release notes from https://issues.apache.org/jira/browse/BIGTOP here. -->
 
+        <h3>Release Notes - Bigtop - Version 3.1.1</h3>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3712'>BIGTOP-3712</a>] -         Kafka smoke test failed with Zookeeper built with maven
+</li>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3714'>BIGTOP-3714</a>] -         Fix error of DataNode httpserver due to conflicting dependency on Netty in branch-3.1
+</li>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3724'>BIGTOP-3724</a>] -         Increment the release number of ZooKeeper and Kafka
+</li>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3725'>BIGTOP-3725</a>] -         Puppet 3 is removed from EPEL for CentOS 7
+</li>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3733'>BIGTOP-3733</a>] -         Building Logstash fails on Rocky 8
+</li>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3735'>BIGTOP-3735</a>] -         Sqoop bin script doesn&#39;t work on Bigtop-3.1.0
+</li>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3747'>BIGTOP-3747</a>] -         Zeppelin RPM package is missing notebookrepo-filesystem-0.10.0.jar
+</li>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3751'>BIGTOP-3751</a>] -         Fix build failure of Zeppelin due to dependency convergence error
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3736'>BIGTOP-3736</a>] -         Bump Hadoop to 3.2.4 in branch-3.1
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3669'>BIGTOP-3669</a>] -         Use maven instead of ant to build ZooKeeper
+</li>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3715'>BIGTOP-3715</a>] -         Add TestWebHDFS to smoke-tests
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3742'>BIGTOP-3742</a>] -         Add tez.tar.gz tarball in tez.rpm
+</li>
+</ul>
+
         <h3>Release Notes - Bigtop - Version 3.1.0</h3>
 
 <h2>        Sub-task
@@ -162,8 +208,6 @@
 <h2>        Task
 </h2>
 <ul>
-<li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3586'>BIGTOP-3586</a>] -         Upgrade Bigtop-ambari-mpack to support Ambari 2.7.5 and Hadoop3.x in BIGTOP-3.0 release
-</li>
 <li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3590'>BIGTOP-3590</a>] -         Hbase smoke tests failed on Ubuntu 20.04
 </li>
 <li>[<a href='https://issues.apache.org/jira/browse/BIGTOP-3591'>BIGTOP-3591</a>] -         Upgrading Bigtop-Mpack services deploying scripts aligned to Ambari-2.7.5