diff --git a/openpnm/__version__.py b/openpnm/__version__.py
index 2089adcbba..ad5a2688e5 100644
--- a/openpnm/__version__.py
+++ b/openpnm/__version__.py
@@ -1 +1 @@
-__version__ = '3.3.0.dev5'
+__version__ = '3.4.0.dev0'
diff --git a/setup.cfg b/setup.cfg
index 5a418d85a8..52a6b0c4ac 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.3.0.dev5
+current_version = 3.4.0.dev0
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)\.(?P<release>\D+)(?P<build>\d+)?
 serialize = {major}.{minor}.{patch}.{release}{build}