diff --git a/_pytest/__init__.py b/_pytest/__init__.py
index f6fc9a9e1..9442951b6 100644
--- a/_pytest/__init__.py
+++ b/_pytest/__init__.py
@@ -1,2 +1,2 @@
 #
-__version__ = '2.4.2'
+__version__ = '2.4.3.dev1'
diff --git a/setup.py b/setup.py
index b62d9f095..ed7df7ecd 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@ def main():
         name='pytest',
         description='py.test: simple powerful testing with Python',
         long_description = long_description,
-        version='2.4.2',
+        version='2.4.3.dev1',
         url='http://pytest.org',
         license='MIT license',
         platforms=['unix', 'linux', 'osx', 'cygwin', 'win32'],