diff --git a/README.md b/README.md
index 055b6ff..ce7b13f 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,9 @@
 # go-webdav
 
-A Go library for WebDAV.
+[![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).
 
 ## License