diff --git a/CHANGES.rst b/CHANGES.rst
index 5c605b8..cb0466c 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,9 @@
 CHANGES
 =======
 
+2.1.x (unreleased)
+------------------
+
 2.1.0 (2014.07.25)
 ------------------
 
diff --git a/model_utils/__init__.py b/model_utils/__init__.py
index 9d81bc8..23c8b70 100644
--- a/model_utils/__init__.py
+++ b/model_utils/__init__.py
@@ -1,4 +1,4 @@
 from .choices import Choices
 from .tracker import FieldTracker, ModelTracker
 
-__version__ = '2.1.0'
+__version__ = '2.1.1a'