diff --git a/Vagrantfile b/Vagrantfile
index b4a06ea05..fa9195dd1 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -10,7 +10,7 @@ cd /vagrant
 sudo ./bootstrap/ubuntu.sh
 if [ ! -d "venv" ]; then
   virtualenv --no-site-packages -p python2 venv
-  ./venv/bin/python setup.py dev
+  ./venv/bin/pip install -r requirements.txt -e .[dev]
 fi
 SETUP_SCRIPT
 
diff --git a/docs/contributing.rst b/docs/contributing.rst
index 0ed022724..bfe5216ae 100644
--- a/docs/contributing.rst
+++ b/docs/contributing.rst
@@ -15,7 +15,7 @@ Now you can install the development packages:
 
 .. code-block:: shell
 
-   ./venv/bin/python setup.py dev
+   ./venv/bin/pip install -r requirements.txt -e .[dev]
 
 The code base, including your pull requests, **must** have 100% test
 statement coverage **and** be compliant with the :ref:`coding style
@@ -48,7 +48,7 @@ synced to ``/vagrant``, so you can get started with:
 
   vagrant ssh
   cd /vagrant
-  ./venv/bin/python setup.py install
+  ./venv/bin/pip install -r requirements.txt
   sudo ./venv/bin/letsencrypt
 
 Support for other Linux distributions coming soon.
diff --git a/docs/using.rst b/docs/using.rst
index 3a7940993..f10966602 100644
--- a/docs/using.rst
+++ b/docs/using.rst
@@ -53,7 +53,7 @@ Installation
 .. code-block:: shell
 
    virtualenv --no-site-packages -p python2 venv
-   ./venv/bin/python setup.py install
+   ./venv/bin/pip install -r requirements.txt
    sudo ./venv/bin/letsencrypt
 
 
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 000000000..d7174f103
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,3 @@
+# https://github.com/bw2/ConfigArgParse/issues/17
+-e git+https://github.com/kuba/ConfigArgParse.git#egg=ConfigArgParse
+-e .
diff --git a/tox.ini b/tox.ini
index 47b509203..cd6f3c7b0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,7 @@ envlist = py26,py27,cover,lint
 
 [testenv]
 commands =
-    pip install -e .[testing]
+    pip install -r requirements.txt -e .[testing]
     python setup.py test -q # -q does not suppress errors
 
 setenv =