Update README to match installation documentation

diff --git a/README.md b/README.md
index 93216e9c471f4589eb9aeb8500bda650305ad43b..3b1419407c841846a8f02ffbcf5b82ec92db1b3c 100644 (file)
--- a/README.md
+++ b/README.md
@@ -10,10 +10,17 @@ Tweepy: Twitter for Python!
 
 Installation
 ------------
-The easiest way to install the latest version from PyPI is by using pip:
+
+The easiest way to install the latest version from PyPI is by using
+[pip](https://pip.pypa.io/):
 
     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: