diff --git a/CHANGES.txt b/CHANGES.txt
index d33ee4f343..2cdf6c3457 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,8 @@
+4.0.9
+ * Split and order IDEA workspace template VM_PARAMETERS (CASSANDRA-18242)
+Merged from 3.11:
+Merged from 3.0:
+
 4.0.8
  * Log warning message on aggregation queries without key or on multiple keys (CASSANDRA-18219)
  * Fix the output of FQL dump tool to properly separate entries (CASSANDRA-18215)
diff --git a/build.xml b/build.xml
index ec95b372e8..68a50fa752 100644
--- a/build.xml
+++ b/build.xml
@@ -33,7 +33,7 @@
     <property name="debuglevel" value="source,lines,vars"/>
 
     <!-- default version and SCM information -->
-    <property name="base.version" value="4.0.8"/>
+    <property name="base.version" value="4.0.9"/>
     <property name="scm.connection" value="scm:https://gitbox.apache.org/repos/asf/cassandra.git"/>
     <property name="scm.developerConnection" value="scm:https://gitbox.apache.org/repos/asf/cassandra.git"/>
     <property name="scm.url" value="https://gitbox.apache.org/repos/asf?p=cassandra.git;a=tree"/>
diff --git a/debian/changelog b/debian/changelog
index 65c6f94d6a..d2438f92a0 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+cassandra (4.0.9) UNRELEASED; urgency=medium
+
+  * New release
+
+ -- Stefan Miklosovic <smiklosovic@apache.org>  Wed, 15 Feb 2023 08:05:12 +0100
+
 cassandra (4.0.8) unstable; urgency=medium
 
   * New release