diff --git a/doc/source/conf.py b/doc/source/conf.py
index 545336c..3ac85d4 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -74,9 +74,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = u'2.3'
+version = u'2.4'
 # The full version, including alpha/beta/rc tags.
-release = u'2.3.0'
+release = u'2.4.0.dev0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/setup.cfg b/setup.cfg
index 03c2f99..5f9f4a4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = pygfunction
-version = 2.3.0
+version = 2.4.0.dev0
 description = A g-function calculator for Python
 author = Massimo Cimmino
 author_email = massimo.cimmino@polymtl.ca