diff --git a/README.rst b/README.rst
index dc5eb3a24..51de16e2b 100644
--- a/README.rst
+++ b/README.rst
@@ -3,7 +3,7 @@
 CANTERA
 *******
 
-Version 2.2a (development)
+Version 2.2.0b1 (development)
 
 License Information
 ===================
diff --git a/SConstruct b/SConstruct
index 1394af1dc..00fd2ec24 100644
--- a/SConstruct
+++ b/SConstruct
@@ -590,7 +590,7 @@ config_options = [
            with a prefix like '/opt/cantera'. 'debian' installs to the stage
            directory in a layout used for generating Debian packages.""",
      defaults.fsLayout, ('standard','compact','debian')),
-    ('cantera_version', '', '2.2a1')
+    ('cantera_version', '', '2.2.0b1')
 ]
 
 opts.AddVariables(*config_options)
diff --git a/doc/sphinx/conf.py b/doc/sphinx/conf.py
index 0d7d3fca1..1f1649d9d 100644
--- a/doc/sphinx/conf.py
+++ b/doc/sphinx/conf.py
@@ -86,7 +86,7 @@ copyright = u'2012, Cantera Developers'
 # The short X.Y version.
 version = '2.2'
 # The full version, including alpha/beta/rc tags.
-release = '2.2a'
+release = '2.2.0b1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.