diff --git a/openpnm/__version__.py b/openpnm/__version__.py
index fbda10a2e5..0d4914da33 100644
--- a/openpnm/__version__.py
+++ b/openpnm/__version__.py
@@ -1 +1 @@
-__version__ = '3.2.1.dev3'
+__version__ = '3.2.1.dev4'
diff --git a/setup.cfg b/setup.cfg
index f639ab2479..f922755fbc 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.2.1.dev3
+current_version = 3.2.1.dev4
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)\.(?P<release>\D+)(?P<build>\d+)?
 serialize = {major}.{minor}.{patch}.{release}{build}