diff --git a/.travis.yml b/.travis.yml
index e15116b4..85f17f41 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ python:
   - "3.4"
 install:
   - pip install coveralls
+  - pip install -r requirements.txt
 script:
   coverage run --source=asn1tools setup.py test
 after_success:
diff --git a/README.rst b/README.rst
index 7a716de1..86690d7d 100644
--- a/README.rst
+++ b/README.rst
@@ -8,6 +8,8 @@ ASN.1 tools.
 
 Project homepage: https://github.com/eerimoq/asn1tools
 
+Documentation: http://asn1tools.readthedocs.org/en/latest
+
 Installation
 ============
 
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 00000000..2426106b
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+bitstruct