diff --git a/README.md b/README.md
index 6a9aa8220..bc24c227c 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 Ubuntu 12.04 LTS 64bit, g++-4.8 | clang++-3.3
 
 [![Build Status](https://travis-ci.org/soonhokong/lean-osx.png?branch=master)](https://travis-ci.org/soonhokong/lean-osx)
-Mac OS X 10.8.2, g++-4.8
+Mac OS X 10.8.2, g++-4.9
 
 [![Build Status](https://travis-ci.org/soonhokong/lean-windows.png?branch=master)](https://travis-ci.org/soonhokong/lean-windows)
 Windows, x86_64-w64-mingw32-g++-4.8.1