diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 728d0cd..42fbb97 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,8 @@
+What's new in version 1.0
+-------------------------
+
+In development
+
 What's new in version 0.9
 -------------------------
 
diff --git a/LICENSE b/LICENSE
index 3ee3098..1ba0b71 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 New BSD License
 
-Copyright (c) 2018-2023 Joel Nothman.
+Copyright (c) 2018-2024 Joel Nothman.
 All rights reserved.
 
 
@@ -14,7 +14,7 @@ modification, are permitted provided that the following conditions are met:
      documentation and/or other materials provided with the distribution.
   c. The names of the contributors may not be used to endorse or promote
      products derived from this software without specific prior written
-     permission. 
+     permission.
 
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
diff --git a/doc/conf.py b/doc/conf.py
index d4b40f2..b98adf5 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -74,7 +74,7 @@
 
 # General information about the project.
 project = "upsetplot"
-copyright = "2018-2023, Joel Nothman"
+copyright = "2018-2024, Joel Nothman"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
diff --git a/upsetplot/__init__.py b/upsetplot/__init__.py
index aa0e283..4cb4364 100644
--- a/upsetplot/__init__.py
+++ b/upsetplot/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.9.dev1"
+__version__ = "0.10dev1"
 
 import os