diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 3c472115..0c40366c 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 5.8.3
+current_version = 5.8.4.dev0
 commit = True
 tag = True
 sign_tags = True
diff --git a/docs/conf.py b/docs/conf.py
index ccb00c62..8b784584 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -86,7 +86,7 @@ def compare(list1, list2):
 
 # The full version, including alpha/beta/rc tags
 # The short X.Y version.
-version = '5.8.3'
+version = '5.8.4.dev0'
 release = version
 
 
diff --git a/setup.py b/setup.py
index 1c5f86b9..a53e4c0f 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@ def read(fname):
     return open(os.path.join(os.path.dirname(__file__), fname)).read()
 
 
-version = '5.8.3'
+version = '5.8.4.dev0'
 url = "https://github.com/ome/omero-scripts/"
 
 setup(