Add installation documentation for async extra

diff --git a/docs/install.rst b/docs/install.rst
index 7c39185995382688f93cead26082bbf3ec3446a5..ac57688ecc0e5fa6cf513cde35578fff98ef0873 100644 (file)
--- a/docs/install.rst
+++ b/docs/install.rst
@@ -5,6 +5,11 @@ The easiest way to install the latest version from PyPI is by using pip::
 
     pip install tweepy
 
+To use the ``tweepy.asynchronous`` subpackage, be sure to install with the
+``async`` extra::
+
+    pip install tweepy[async]
+
 You can also use Git to clone the repository from GitHub to install the latest
 development version::