diff --git a/README.rst b/README.rst
index 76da3dd4e..d383612a5 100644
--- a/README.rst
+++ b/README.rst
@@ -3,7 +3,7 @@
 Cantera
 *******
 
-Version 2.4.0a1 (development)
+Version 2.4.0a2 (development)
 
 .. image:: https://zenodo.org/badge/DOI/10.5281/zenodo.170284.svg
    :target: https://doi.org/10.5281/zenodo.170284
diff --git a/SConstruct b/SConstruct
index 184c3ff09..10755aab1 100644
--- a/SConstruct
+++ b/SConstruct
@@ -708,7 +708,7 @@ for arg in ARGUMENTS:
         sys.exit(1)
 
 # Require a StrictVersion-compatible version
-env['cantera_version'] = "2.4.0a1"
+env['cantera_version'] = "2.4.0a2"
 ctversion = StrictVersion(env['cantera_version'])
 # For use where pre-release tags are not permitted (MSI, sonames)
 env['cantera_pure_version'] = '.'.join(str(x) for x in ctversion.version)