diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index b1cdfde..a28d16c 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 4.3.0
+current_version = 4.3.1-dev
 commit = False
 tag = False
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\-(?P<release>[a-z]+))?
@@ -16,4 +16,3 @@ optional_value = rel
 values = 
 	dev
 	rel
-
diff --git a/pycycle/__init__.py b/pycycle/__init__.py
index e9655e5..ca383cc 100644
--- a/pycycle/__init__.py
+++ b/pycycle/__init__.py
@@ -1 +1 @@
-__version__ = '4.3.0'
\ No newline at end of file
+__version__ = '4.3.1-dev'
\ No newline at end of file