diff --git a/build/build.xml b/build/build.xml
index b026628e32..f9759a537b 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -2,7 +2,7 @@
 
 <project name="phpBB" description="The phpBB forum software" default="all" basedir="../">
 	<!-- a few settings for the build -->
-	<property name="newversion" value="3.3.8-RC1" />
+	<property name="newversion" value="3.3.9-dev" />
 	<property name="prevversion" value="3.3.7" />
 	<property name="olderversions" value="3.1.0, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.1.7, 3.1.7-pl1, 3.1.8, 3.1.9, 3.1.10, 3.1.11, 3.1.12, 3.2.0, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.2.10, 3.2.11, 3.3.0, 3.3.1, 3.3.2, 3.3.3, 3.3.4, 3.3.5, 3.3.6" />
 	<!-- no configuration should be needed beyond this point -->
diff --git a/phpBB/includes/constants.php b/phpBB/includes/constants.php
index 7874e75cf2..3020cb52fd 100644
--- a/phpBB/includes/constants.php
+++ b/phpBB/includes/constants.php
@@ -28,7 +28,7 @@ if (!defined('IN_PHPBB'))
 */
 
 // phpBB Version
-@define('PHPBB_VERSION', '3.3.8-RC1');
+@define('PHPBB_VERSION', '3.3.9-dev');
 
 // QA-related
 // define('PHPBB_QA', 1);
diff --git a/phpBB/install/schemas/schema_data.sql b/phpBB/install/schemas/schema_data.sql
index b2c38b9559..6dc2075a23 100644
--- a/phpBB/install/schemas/schema_data.sql
+++ b/phpBB/install/schemas/schema_data.sql
@@ -316,7 +316,7 @@ INSERT INTO phpbb_config (config_name, config_value) VALUES ('update_hashes_lock
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('upload_icons_path', 'images/upload_icons');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('upload_path', 'files');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('use_system_cron', '0');
-INSERT INTO phpbb_config (config_name, config_value) VALUES ('version', '3.3.8-RC1');
+INSERT INTO phpbb_config (config_name, config_value) VALUES ('version', '3.3.9-dev');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('warnings_expire_days', '90');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('warnings_gc', '14400');