diff --git a/README.md b/README.md
index aa1072f6..2fd9c81a 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
-# blobstore [![Build Status](https://travis-ci.org/smessmer/blobstore.svg)](https://travis-ci.org/smessmer/blobstore)
-Store resizeable blobs of data
+# blobstore [![Build Status](https://travis-ci.org/smessmer/blobstore.svg?branch=master)](https://travis-ci.org/smessmer/blobstore)
+
+Store resizeable blobs of data using blocks from a [blockstore](https://github.com/cryfs/blockstore).
+This is used by [CryFS](https://github.com/cryfs/cryfs).