diff --git a/README.rst b/README.rst
index c7d40ae..8e7cf07 100644
--- a/README.rst
+++ b/README.rst
@@ -17,3 +17,4 @@ Documentation, installation and getting started instructions are at
 http://channels.readthedocs.org
 
 You can also install channels from PyPI as the ``channels`` package.
+You'll likely also want ``asgi_redis`` to provide the Redis channel layer.
diff --git a/setup.py b/setup.py
index 29ee590..9e393b5 100644
--- a/setup.py
+++ b/setup.py
@@ -12,5 +12,6 @@ setup(
     include_package_data=True,
     install_requires=[
         'Django',
+        'asgiref',
     ]
 )