diff --git a/build.gradle b/build.gradle
index 786ea4743246..7967e3966213 100644
--- a/build.gradle
+++ b/build.gradle
@@ -36,7 +36,7 @@ apply from: file('gradle/globals.gradle')
 // Calculate project version:
 version = {
   // Release manager: update base version here after release:
-  String baseVersion = '9.11.0'
+  String baseVersion = '9.12.0'
 
   // On a release explicitly set release version in one go:
   //  -Dversion.release=x.y.z
diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index 2bfe78fafe95..05153a6c0290 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -3,6 +3,32 @@ Lucene Change Log
 For more information on past and future Lucene versions, please see:
 http://s.apache.org/luceneversions
 
+======================== Lucene 9.12.0 =======================
+
+API Changes
+---------------------
+(No changes)
+
+New Features
+---------------------
+(No changes)
+
+Improvements
+---------------------
+(No changes)
+
+Optimizations
+---------------------
+(No changes)
+
+Bug Fixes
+---------------------
+(No changes)
+
+Other
+---------------------
+(No changes)
+
 ======================== Lucene 9.11.0 =======================
 
 API Changes
diff --git a/lucene/core/src/java/org/apache/lucene/util/Version.java b/lucene/core/src/java/org/apache/lucene/util/Version.java
index 03ebde0290ca..a24cd7ba2d18 100644
--- a/lucene/core/src/java/org/apache/lucene/util/Version.java
+++ b/lucene/core/src/java/org/apache/lucene/util/Version.java
@@ -305,11 +305,16 @@ public final class Version {
   @Deprecated public static final Version LUCENE_9_10_0 = new Version(9, 10, 0);
 
   /**
-   * Match settings and bugs in Lucene's 9.11.0 release.
+   * @deprecated (9.12.0) Use latest
+   */
+  @Deprecated public static final Version LUCENE_9_11_0 = new Version(9, 11, 0);
+
+  /**
+   * Match settings and bugs in Lucene's 9.12.0 release.
    *
    * <p>Use this to get the latest &amp; greatest settings, bug fixes, etc, for Lucene.
    */
-  public static final Version LUCENE_9_11_0 = new Version(9, 11, 0);
+  public static final Version LUCENE_9_12_0 = new Version(9, 12, 0);
 
   // To add a new version:
   //  * Only add above this comment
@@ -325,7 +330,7 @@ public final class Version {
    * <b>re-test your entire application</b> to ensure it behaves as expected, as some defaults may
    * have changed and may break functionality in your application.
    */
-  public static final Version LATEST = LUCENE_9_11_0;
+  public static final Version LATEST = LUCENE_9_12_0;
 
   /**
    * Constant for backwards compatibility.