diff --git a/CHANGELOG.md b/CHANGELOG.md
index 16502bcc..34bc118e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Changelog
 
+## 3.7.4.dev
+
 ## 3.7.3
 * Extension: expose RADICALE:version for authenticated users via PROPFIND
 * Fix: sharing: GET request on single item with bday conversion
diff --git a/pyproject.toml b/pyproject.toml
index 216d30ab..cf738d86 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "Radicale"
 # When the version is updated, a new section in the CHANGELOG.md file must be
 # added too.
 readme = "README.md"
-version = "3.7.3"
+version = "3.7.4.dev"
 authors = [{name = "Guillaume Ayoub", email = "guillaume.ayoub@kozea.fr"}, {name = "Unrud", email = "unrud@outlook.com"}, {name = "Peter Bieringer", email = "pb@bieringer.de"}]
 license = {text = "GNU GPL v3"}
 description = "CalDAV and CardDAV Server"
diff --git a/setup.py.legacy b/setup.py.legacy
index 25817dcc..2d968210 100644
--- a/setup.py.legacy
+++ b/setup.py.legacy
@@ -21,7 +21,7 @@ from setuptools import find_packages, setup
 
 # When the version is updated, a new section in the CHANGELOG.md file must be
 # added too.
-VERSION = "3.7.3"
+VERSION = "3.7.4.dev"
 
 with open("README.md", encoding="utf-8") as f:
     long_description = f.read()