diff --git a/doc/src/conf.py b/doc/src/conf.py
index 9d10796..901ef95 100644
--- a/doc/src/conf.py
+++ b/doc/src/conf.py
@@ -40,9 +40,9 @@ author = 'Oracle'
 # other places throughout the built documents.
 #
 # The short X.Y version.
-version = '6.2'
+version = '6.3'
 # The full version, including alpha/beta/rc tags.
-release = '6.2.1'
+release = '6.3.0-dev'
 
 # There are two options for replacing |today|: either, you set today to some
 # non-false value, then it is used:
diff --git a/setup.py b/setup.py
index 9d97fbf..cce675f 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@ except:
     from distutils.extension import Extension
 
 # define build constants
-BUILD_VERSION = "6.2.1"
+BUILD_VERSION = "6.3-dev"
 
 # setup extra link and compile args
 extraLinkArgs = []