diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 `msgpack` for C/C++
 ===================
 
-Version 0.5.9 [![Build Status](https://travis-ci.org/msgpack/msgpack-c.svg?branch=master)](https://travis-ci.org/msgpack/msgpack-c)
+Version 1.0.0 [![Build Status](https://travis-ci.org/msgpack/msgpack-c.svg?branch=master)](https://travis-ci.org/msgpack/msgpack-c)
 
 It's like JSON but small and fast.