diff --git a/README.md b/README.md
index 9f800f40..f39d4d97 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,7 @@ CppJieba是"结巴(Jieba)"中文分词的C++版本
 ```sh
 git clone --depth=10 --branch=master git://github.com/yanyiwu/cppjieba.git
 cd cppjieba
+git submodule init && git submodule update
 mkdir build
 cd build
 cmake ..