diff --git a/CHANGELOG b/CHANGELOG
index 1fa98ee870..df15f41ebf 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+Version 2019.09-dev (UNRELEASED)
+
 Version 2019.06 (2019-06-23)
   Friendica Core:
     Update to the tranlation (CS, DE, EN-GB, EN-US, ET, FR, IT, PL, PT-BR, SV) [translation teams]
diff --git a/VERSION b/VERSION
index 4eda9a567d..bb3511a1d2 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2019.06
+2019.09-dev
diff --git a/boot.php b/boot.php
index 24e013fa11..086e74d2f4 100644
--- a/boot.php
+++ b/boot.php
@@ -31,7 +31,7 @@ use Friendica\Util\DateTimeFormat;
 
 define('FRIENDICA_PLATFORM',     'Friendica');
 define('FRIENDICA_CODENAME',     'Dalmatian Bellflower');
-define('FRIENDICA_VERSION',      '2019.06');
+define('FRIENDICA_VERSION',      '2019.09-dev');
 define('DFRN_PROTOCOL_VERSION',  '2.23');
 define('NEW_UPDATE_ROUTINE_VERSION', 1170);