diff --git a/mpl_sphinx_theme/_version.py b/mpl_sphinx_theme/_version.py
index dc30c65..5dbb30c 100644
--- a/mpl_sphinx_theme/_version.py
+++ b/mpl_sphinx_theme/_version.py
@@ -4,5 +4,5 @@
 # Copyright (c) Matplotlib developers.
 # Distributed under the terms of the Modified BSD License.
 
-version_info = (3, 9, 0)
-__version__ = ".".join(map(str, version_info)) + "rc1"
+version_info = (3, 9, 1)
+__version__ = ".".join(map(str, version_info)) + "dev0"