diff --git a/DEVELOPMENT.rst b/DEVELOPMENT.rst
index 38cb7a101..b7e10bc99 100644
--- a/DEVELOPMENT.rst
+++ b/DEVELOPMENT.rst
@@ -18,11 +18,11 @@ a. Check requirements
Make sure that you have installed `Python (>= 3.4) `_,
`Node.js (>=4.x) `_, `npm - Node Package Manager (>=3.x)
`_ and `Git `_ on your system. You also
-need header files and a static library for Python.
+need build-essential packages and header files and a static library for Python.
For Ubuntu 16.04 e. g. run::
- $ sudo apt-get install git nodejs nodejs-legacy npm python3-dev
+ $ sudo apt-get install git nodejs nodejs-legacy npm build-essential python3-dev
b. Get OpenSlides source code
diff --git a/MANIFEST.in b/MANIFEST.in
index b79579b32..4d0cf794e 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -3,6 +3,7 @@ include CHANGELOG
include LICENSE
include README.rst
include requirements_production.txt
+include requirements_big_mode.txt
include bower.json
recursive-include openslides *.*
exclude openslides/__pycache__/*
diff --git a/README.rst b/README.rst
index ed622c773..b6444c5ff 100644
--- a/README.rst
+++ b/README.rst
@@ -28,7 +28,9 @@ a. Check requirements
'''''''''''''''''''''
Make sure that you have installed `Python (>= 3.4)
-`_ on your system.
+`_ on your system. You also need build-essential
+packages (``build-essential``) and header files and a static library for
+Python (``python3-dev``).
b. Setup a virtual Python environment (optional)
@@ -120,6 +122,11 @@ If you want to contribute to OpenSlides, have a look at `OpenSlides website
`instruction to install the development version
`_.
+In OpenSlides repository you find a ``Dockerfile`` but this is not for
+production use. See our `Multi instance backend for OpenSlides
+`_ for more
+information.
+
Installation for big assemblies
===============================
@@ -157,40 +164,7 @@ Used software
OpenSlides uses the following projects or parts of them:
-* `asgiref `_, License: BSD
-
-* `Autobahn `_, License: MIT
-
-* `Constantly `_, License: MIT
-
-* `daphne `_, License: BSD
-
-* `Django `_, License: BSD
-
-* `Django Channels `_, License: BSD
-
-* `django-jsonfield `_,
- License: MIT
-
-* `Django REST framework `_, License:
- BSD
-
-* `Incremental `_, License: MIT
-
-* `PyPDF2 `_, License: BSD
-
-* `roman `_, License: Python 2.1.1
-
-* `setuptools `_, License: MIT
-
-* `Six `_, License: MIT
-
-* `Twisted `_, License: MIT
-
-* `txaio `_, License: MIT
-
-* `zope.interface `,
- License: ZPL 2.1
+* Several Python packages (see ``requirements_production.txt``).
* Several JavaScript packages (see ``bower.json``)