diff --git a/src/furo/__init__.py b/src/furo/__init__.py
index fa63f975..97a7cfbc 100644
--- a/src/furo/__init__.py
+++ b/src/furo/__init__.py
@@ -1,6 +1,6 @@
 """A clean customisable Sphinx documentation theme."""
 
-__version__ = "2023.05.20"
+__version__ = "2023.05.20.dev1"
 
 import hashlib
 import logging