diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index c63e675..4b58bdd 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.7.7
+current_version = 0.7.8-dev
 commit = True
 tag = False
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?
diff --git a/pyecore/__init__.py b/pyecore/__init__.py
index 1d7eb44..ed27205 100644
--- a/pyecore/__init__.py
+++ b/pyecore/__init__.py
@@ -2,4 +2,4 @@
 
 """
 
-__version__ = "0.7.7"
+__version__ = "0.7.8-dev"
diff --git a/setup.py b/setup.py
index 4cdb267..518c00c 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 
 setup(
     name='pyecore-py2',
-    version='0.7.7',
+    version='0.7.8-dev',
     description=('A Python(ic) Implementation of the Eclipse Modeling '
                  'Framework (EMF/Ecore), Python 2.7 backport'),
     long_description=open('README.rst').read(),