diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 62ba8c8..4632631 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.6.2
+current_version = 0.6.3-dev0
 commit = True
 tag = False
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\-(?P<release>[a-z]+)(?P<build>\d+))?
diff --git a/VERSION b/VERSION
index b1d7abc..9d5774f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.6.2
\ No newline at end of file
+0.6.3-dev0
\ No newline at end of file
diff --git a/pycobi/__init__.py b/pycobi/__init__.py
index ab4eae8..8df32b1 100644
--- a/pycobi/__init__.py
+++ b/pycobi/__init__.py
@@ -29,6 +29,6 @@
 
 __author__ = "Richard Gast"
 __status__ = "Development"
-__version__ = "0.6.2"
+__version__ = "0.6.3-dev0"
 
 from .pycobi import ODESystem