diff --git a/CHANGES.txt b/CHANGES.txt
index 4c0db9b86b..8b0879d1c0 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,8 @@
+4.0.13
+Merged from 3.11:
+Merged from 3.0:
+
+
 4.0.12
  * Skip version check if an endpoint is dead state in Gossiper#upgradeFromVersionSupplier (CASSANDRA-19187)
  * Fix Gossiper::hasMajorVersion3Nodes to return false during minor upgrade (CASSANDRA-18999)
diff --git a/build.xml b/build.xml
index 7748470030..8726455598 100644
--- a/build.xml
+++ b/build.xml
@@ -34,7 +34,7 @@
     <property name="debuglevel" value="source,lines,vars"/>
 
     <!-- default version and SCM information -->
-    <property name="base.version" value="4.0.12"/>
+    <property name="base.version" value="4.0.13"/>
     <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 758b62585c..d534302528 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+cassandra (4.0.13) UNRELEASED; urgency=medium
+
+  * New release
+
+ -- Stefan Miklosovic <smiklosovic@apache.org>  Tue, 23 Jan 2024 15:16:14 +0100
+
 cassandra (4.0.12) unstable; urgency=medium
 
   * New release