diff --git a/docs/conf.py b/docs/conf.py
index 2a80312..7206fab 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -9,7 +9,7 @@
 project = 'commonnexus'
 copyright = '2023, Robert Forkel'
 author = 'Robert Forkel'
-release = '1.6.1'
+release = '1.6.2.dev0'
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
diff --git a/setup.cfg b/setup.cfg
index 2e09ad2..f2372ab 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = commonnexus
-version = 1.6.1
+version = 1.6.2.dev0
 author = Robert Forkel
 author_email = robert_forkel@eva.mpg.de
 description = A nexus (phylogenetics) file reader and writer (.nex, .trees)
diff --git a/src/commonnexus/__init__.py b/src/commonnexus/__init__.py
index 8174c4e..fa193b1 100644
--- a/src/commonnexus/__init__.py
+++ b/src/commonnexus/__init__.py
@@ -1,4 +1,4 @@
 from .nexus import Nexus, Config  # noqa: F401
 from commonnexus.blocks import Block  # noqa: F401
 
-__version__ = '1.6.1'
+__version__ = '1.6.2.dev0'