diff --git a/version.php b/version.php
index 1bf9c604b8a..07b74a8c2a2 100644
--- a/version.php
+++ b/version.php
@@ -29,11 +29,11 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$version  = 2017091201.00;              // YYYYMMDD      = weekly release date of this DEV branch.
+$version  = 2017091500.00;              // YYYYMMDD      = weekly release date of this DEV branch.
                                         //         RR    = release increments - 00 in DEV branches.
                                         //           .XX = incremental changes.
 
-$release  = '3.4dev (Build: 20170907)'; // Human-friendly version name
+$release  = '3.4dev (Build: 20170915)'; // Human-friendly version name
 
 $branch   = '34';                       // This version's branch.
 $maturity = MATURITY_ALPHA;             // This version's maturity level.