diff --git a/CHANGES.txt b/CHANGES.txt
index 2569bec195..27398de009 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,6 @@
+3.11.20
+
+
 3.11.19
 Merged from 3.0:
  * Minimise expensive reads during authz flow in 3.0/3.11 (CASSANDRA-20293)
diff --git a/build.xml b/build.xml
index e7a005a69c..ccdb3ba605 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="3.11.19"/>
+    <property name="base.version" value="3.11.20"/>
     <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"/>
diff --git a/debian/changelog b/debian/changelog
index 3912c63bdc..4cc63baa92 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+cassandra (3.11.20) UNRELEASED; urgency=medium
+
+  * New release
+
+ -- Stefan Miklosovic <smiklosovic@apache.org>  Fri, 07 Feb 2025 07:41:47 +0100
+
 cassandra (3.11.19) unstable; urgency=medium
 
   * New release