diff --git a/README.md b/README.md
index ae9e1f0..6d29681 100644
--- a/README.md
+++ b/README.md
@@ -4,3 +4,7 @@
 
 
 A Pressbooks plugin which provides some basic activity statistics for a Pressbooks network.
+
+## Caching
+
+To cache stats for a network, run (with [wp-cli](https://wp-cli.org)): `wp eval-file bin/cache.php`. You can set up a cron job for this if you want.