diff --git a/README.md b/README.md
index f3c4842..50b8926 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,12 @@
 
 [![GoDoc](https://godoc.org/github.com/emersion/go-webdav?status.svg)](https://godoc.org/github.com/emersion/go-webdav)
 
-A Go library for [WebDAV](https://tools.ietf.org/html/rfc4918) and
-[CardDAV](https://tools.ietf.org/html/rfc6352).
+A Go library for [WebDAV], [CalDAV] and [CardDAV].
 
 ## License
 
 MIT
+
+[WebDAV]: https://tools.ietf.org/html/rfc4918
+[CalDAV]: https://tools.ietf.org/html/rfc4791
+[CardDAV]: https://tools.ietf.org/html/rfc6352