diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 9c346c7..530dce7 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.5.8
+current_version = 0.5.9-dev
 commit = True
 tag = False
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(?:-(?P<release>[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+(?P<build>[0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 61aed03..7bcc8ac 100755
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -62,7 +62,7 @@
 # built documents.
 #
 # The full version, including alpha/beta/rc tags.
-release = '0.5.8'
+release = '0.5.9-dev'
 
 # The short X.Y version.
 parsed_version = re.match(
diff --git a/src/pyctd/__init__.py b/src/pyctd/__init__.py
index 01a405a..33d74e0 100755
--- a/src/pyctd/__init__.py
+++ b/src/pyctd/__init__.py
@@ -21,7 +21,7 @@
 
 __all__ = ['update', 'query', 'set_connection', 'set_mysql_connection']
 
-__version__ = '0.5.8'
+__version__ = '0.5.9-dev'
 
 __title__ = 'PyCTD'
 __description__ = 'Importing and querying CTD'