diff --git a/setup.py b/setup.py
index f2790ddd3..37a936584 100644
--- a/setup.py
+++ b/setup.py
@@ -368,7 +368,7 @@ def run(self):
 
 setup(
     name="pythonnet",
-    version="2.2.2",
+    version="2.3.0.dev1",
     description=".Net and Mono integration for Python",
     url='https://pythonnet.github.io/',
     license='MIT',
diff --git a/src/runtime/resources/clr.py b/src/runtime/resources/clr.py
index c329b1f6d..ccd17889f 100644
--- a/src/runtime/resources/clr.py
+++ b/src/runtime/resources/clr.py
@@ -2,7 +2,7 @@
 Code in this module gets loaded into the main clr module.
 """
 
-__version__ = "2.2.2"
+__version__ = "2.3.0.dev1"
 
 
 class clrproperty(object):