diff --git a/README.md b/README.md
index d6ffe048..84528556 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
-# blockstore [![Build Status](https://travis-ci.org/smessmer/blockstore.svg)](https://travis-ci.org/smessmer/blockstore)
-Store blocks of data
+# blockstore [![Build Status](https://travis-ci.org/smessmer/blockstore.svg?branch=master)](https://travis-ci.org/smessmer/blockstore)
+
+Store (encrypted) fixed-size blocks of data in different backends.
+This is used by [CryFS](https://github.com/cryfs/cryfs).