diff --git a/openslides/__init__.py b/openslides/__init__.py
index a8832cd05..8ada5daea 100644
--- a/openslides/__init__.py
+++ b/openslides/__init__.py
@@ -1,6 +1,6 @@
 __author__ = 'OpenSlides Team <support@openslides.org>'
 __description__ = 'Presentation and assembly system'
-__version__ = '2.3-dev'
+__version__ = '3.0-dev'
 __license__ = 'MIT'
 __url__ = 'https://openslides.org'
 
diff --git a/setup.py b/setup.py
index 9fd34dfe4..fbddce47a 100644
--- a/setup.py
+++ b/setup.py
@@ -14,6 +14,9 @@ with open('README.rst') as readme:
 with open('requirements_production.txt') as requirements_production:
     install_requires = requirements_production.readlines()
 
+with open('requirements_big_mode.txt') as requirements_big_mode:
+    extras_requires = requirements_production.readlines()
+
 setup(
     name='openslides',
     author=openslides_author,
@@ -38,4 +41,5 @@ setup(
     packages=find_packages(exclude=['tests', 'tests.*']),
     include_package_data=True,
     install_requires=install_requires,
+    extras_require={'big_mode': extras_requires},
     entry_points={'console_scripts': ['openslides = openslides.__main__:main']})