diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..e036f2e
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,18 @@
+Acmetool LE client
+==================
+
+Install and configure the `acmetool` LE client.
+
+
+Variables
+---------
+
+* `acme_notification_email` (Default `root@example.org`):
+  LE account email. The default needs to be changed!
+
+
+References
+----------
+
+* [acmetool](https://github.com/hlandau/acmetool)
+* [acmetool user's guide](https://hlandau.github.io/acmetool/userguide)