diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 4ab0776..480a7bb 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,7 +1,7 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 0.5.3
+current_version = 0.5.4.dev0
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\.(?P<release>[a-z]+\d+))?
 serialize = 
 	{major}.{minor}.{patch}.{release}
diff --git a/colmet/__init__.py b/colmet/__init__.py
index 528167a..3543bfa 100644
--- a/colmet/__init__.py
+++ b/colmet/__init__.py
@@ -6,5 +6,5 @@
     distributed environnement
 
 '''
-__version__ = '0.5.3'
+__version__ = '0.5.4.dev0'
 VERSION = __version__