diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index c015fb4fa2b7c8c746d8eab430c7a97344e1f2b1..76c2e69393759e97b2714a3ed0239f056e2d7e74 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,4 +1,7 @@
 
+Drupal 7.xx, xxxx-xx-xx (development version)
+-----------------------
+
 Drupal 7.54, 2017-02-01
 -----------------------
 - Modules are now able to define theme engines (API addition:
diff --git a/includes/bootstrap.inc b/includes/bootstrap.inc
index 99a5ac84dcf3cb487365488f528200efd70b2155..36bd0facd1670fde24aaebd4fab060a90fe781d5 100644
--- a/includes/bootstrap.inc
+++ b/includes/bootstrap.inc
@@ -8,7 +8,7 @@
 /**
  * The current system version.
  */
-define('VERSION', '7.54');
+define('VERSION', '7.55-dev');
 
 /**
  * Core API compatibility.