diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 784fd368f99..d04d1c50f21 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,3 +1,6 @@
+Drupal 7.xx, xxxx-xx-xx (development version)
+-----------------------
+
 Drupal 7.90, 2022-06-01
 -----------------------
 - Improved support for PHP 8.1
diff --git a/includes/bootstrap.inc b/includes/bootstrap.inc
index 51124968942..40ccee9a5a1 100644
--- a/includes/bootstrap.inc
+++ b/includes/bootstrap.inc
@@ -8,7 +8,7 @@
 /**
  * The current system version.
  */
-define('VERSION', '7.90');
+define('VERSION', '7.91-dev');
 
 /**
  * Core API compatibility.