diff --git a/install/sql/ispconfig3.sql b/install/sql/ispconfig3.sql
index ec750ba125e74d828d5cc4f39cc8a10ca6c6f00b..eaf060a8a8f98ce2b94ba856175c51bef889c983 100644
--- a/install/sql/ispconfig3.sql
+++ b/install/sql/ispconfig3.sql
@@ -2482,7 +2482,7 @@ INSERT INTO `sys_user` (`userid`, `sys_userid`, `sys_groupid`, `sys_perm_user`,
 -- Dumping data for table `sys_config`
 --
 
-INSERT INTO sys_config VALUES ('db','db_version','3.1b1');
+INSERT INTO sys_config VALUES ('db','db_version','3.1dev');
 INSERT INTO sys_config VALUES ('interface','session_timeout','0');
 
 SET FOREIGN_KEY_CHECKS = 1;
diff --git a/install/tpl/config.inc.php.master b/install/tpl/config.inc.php.master
index 2ba18f3ed37204e1132dce895b2a9777ab8aa682..02a7b2f65ccccde2db89cfcaac24e86307e88843 100644
--- a/install/tpl/config.inc.php.master
+++ b/install/tpl/config.inc.php.master
@@ -56,7 +56,7 @@ $revision = str_replace(array('Revision:','$',' '), '', $svn_revision);
 
 //** Application
 define('ISPC_APP_TITLE', 'ISPConfig');
-define('ISPC_APP_VERSION', '3.1b1');
+define('ISPC_APP_VERSION', '3.1dev');
 define('DEVSYSTEM', 0);