diff --git a/sphinx/__init__.py b/sphinx/__init__.py
index 85efe1de599..cb72434f840 100644
--- a/sphinx/__init__.py
+++ b/sphinx/__init__.py
@@ -19,7 +19,7 @@
 warnings.filterwarnings('ignore', 'The frontend.Option class .*',
                         DeprecationWarning, module='docutils.frontend')
 
-__version__ = '6.0.0b2'
+__version__ = '6.0.0b3'
 __display_version__ = __version__  # used for command line version
 
 #: Version info for better programmatic use.
@@ -30,11 +30,11 @@
 #:
 #: .. versionadded:: 1.2
 #:    Before version 1.2, check the string ``sphinx.__version__``.
-version_info = (6, 0, 0, 'beta', 2)
+version_info = (6, 0, 0, 'beta', 3)
 
 package_dir = path.abspath(path.dirname(__file__))
 
-_in_development = False
+_in_development = True
 if _in_development:
     # Only import subprocess if needed
     import subprocess