diff --git a/CHANGES.rst b/CHANGES.rst
index f1538e8779..5d9efa4914 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,7 +1,7 @@
 Changelog
 =========
 
-Changes in Apache Libcloud 3.9.2
+Changes in Apache Libcloud 4.0.0
 --------------------------------
 
 Common
diff --git a/docs/upgrade_notes.rst b/docs/upgrade_notes.rst
index 1214f07d44..4a8f228148 100644
--- a/docs/upgrade_notes.rst
+++ b/docs/upgrade_notes.rst
@@ -5,7 +5,7 @@ This page describes how to upgrade from a previous version to a new version
 which contains backward incompatible or semi-incompatible changes and how to
 preserve the old behavior when this is possible.
 
-Libcloud 3.9.2
+Libcloud 4.0.0
 --------------
 
 Compute driver implementations now use the same argument order and optionality
diff --git a/libcloud/__init__.py b/libcloud/__init__.py
index 56f5a63f7c..ba9be95dcf 100644
--- a/libcloud/__init__.py
+++ b/libcloud/__init__.py
@@ -39,7 +39,7 @@
 
 __all__ = ["__version__", "enable_debug"]
 
-__version__ = "3.9.2.dev0"
+__version__ = "4.0.0.dev0"
 
 
 def enable_debug(fo):