diff --git a/Lib/ufoLib/__init__.py b/Lib/ufoLib/__init__.py
index 77dafc019..f08eec273 100755
--- a/Lib/ufoLib/__init__.py
+++ b/Lib/ufoLib/__init__.py
@@ -66,7 +66,7 @@ __all__ = [
 	"convertFontInfoValueForAttributeFromVersion2ToVersion1"
 ]
 
-__version__ = "2.4.0.dev0"
+__version__ = "3.0.0.dev0"
 
 
 # ---------
diff --git a/setup.cfg b/setup.cfg
index bbe0beb1e..8c6be1a58 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 2.4.0.dev0
+current_version = 3.0.0.dev0
 commit = True
 tag = False
 tag_name = v{new_version}
diff --git a/setup.py b/setup.py
index a07888bf2..6db65e873 100755
--- a/setup.py
+++ b/setup.py
@@ -147,7 +147,7 @@ http://unifiedfontobject.org
 
 setup_params = dict(
 	name="ufoLib",
-	version="2.4.0.dev0",
+	version="3.0.0.dev0",
 	description="A low-level UFO reader and writer.",
 	author="Just van Rossum, Tal Leming, Erik van Blokland, others",
 	author_email="info@robofab.com",