diff --git a/CHANGES.txt b/CHANGES.txt
index 7533a95..722908f 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,5 @@
+0.12-dev *Next Release*
+
 0.11 (2012-01-07)
 
   - Added a new 65Org16 MPU simulation written by Ed Spittles.
diff --git a/docs/conf.py b/docs/conf.py
index ed5886c..7d678fa 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -46,9 +46,9 @@ copyright = u'2008-2012, Mike Naberezny'
 # built documents.
 #
 # The short X.Y version.
-version = '0.11'
+version = '0.12-dev'
 # The full version, including alpha/beta/rc tags.
-release = '0.11'
+release = '0.12-dev'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/setup.py b/setup.py
index d68f8da..ddbb7e0 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-__version__ = '0.11'
+__version__ = '0.12-dev'
 
 import os
 import sys