diff --git a/docs/conf.py b/docs/conf.py
index 8abf2ffa..ab2300c4 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -2,8 +2,8 @@
 
 project = u'Flask-Bootstrap'
 copyright = u'2013, Marc Brinkmann'
-version = '4.0.0-beta.3.dev1'
-release = '4.0.0-beta.3'
+version = '4.0.0.0.dev1'
+release = '4.0.0.0'
 
 extensions = ['sphinx.ext.autodoc', 'sphinx.ext.intersphinx', 'alabaster']
 source_suffix = '.rst'
diff --git a/flask_bootstrap/__init__.py b/flask_bootstrap/__init__.py
index 6a36672d..fe518e22 100644
--- a/flask_bootstrap/__init__.py
+++ b/flask_bootstrap/__init__.py
@@ -19,7 +19,7 @@ def is_hidden_field_filter(field):
 
 from .forms import render_form
 
-__version__ = '4.0.0-beta.3.dev1'
+__version__ = '4.0.0.0.dev1'
 BOOTSTRAP_VERSION_RE = re.compile(r'(\d+\.\d+\.\d+(\-[a-z]+)?)')
 POPPER_VERSION = '1.12.9'
 JQUERY_VERSION = '3.2.1'
diff --git a/setup.py b/setup.py
index 8046d7e0..5336e272 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@ def read(fname):
 
 setup(
     name='Flask-Bootstrap',
-    version='4.0.0-beta.3.dev1',
+    version='4.0.0.0.dev1',
     url='http://github.com/mbr/flask-bootstrap',
     license='BSD',
     author='Marc Brinkmann',