diff --git a/pylast/__init__.py b/pylast/__init__.py
index fcc3986..7c989dc 100644
--- a/pylast/__init__.py
+++ b/pylast/__init__.py
@@ -32,7 +32,7 @@ import tempfile
 import time
 import xml.dom
 
-__version__ = "2.3.0"
+__version__ = "2.4.0.dev0"
 __author__ = "Amr Hassan, hugovk, Mice Pápai"
 __copyright__ = (
     "Copyright (C) 2008-2010 Amr Hassan, 2013-2018 hugovk, " "2017 Mice Pápai"
diff --git a/setup.py b/setup.py
index a31861d..fe1c40c 100755
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@ setup(
     name="pylast",
     long_description=long_description,
     long_description_content_type="text/markdown",
-    version="2.3.0",
+    version="2.4.0.dev0",
     author="Amr Hassan <amr.hassan@gmail.com> and Contributors",
     install_requires=["six"],
     tests_require=[