diff --git a/docs/tutorial/demo/index.md b/docs/tutorial/demo/index.md
index 31e6148..10071b8 100644
--- a/docs/tutorial/demo/index.md
+++ b/docs/tutorial/demo/index.md
@@ -4,7 +4,7 @@
 
 **下载 Demo**
 
-执行命令下载Demo，若下载较慢，可选择[更多下载方式](../version/download.html#wecross-demo)。
+执行命令下载Demo，若下载较慢，可选择[更多下载方式](../../version/download.html#wecross-demo)。
 
 ``` bash
 cd ~
diff --git a/docs/tutorial/env.md b/docs/tutorial/env.md
index 44f46d3..0f87d14 100644
--- a/docs/tutorial/env.md
+++ b/docs/tutorial/env.md
@@ -42,3 +42,7 @@ sudo yum install -y openssl curl expect tree
 # MacOS
 brew install openssl curl expect tree
 ```
+
+运行WeCross Demo时，需安装
+
+* Docker 17.06.2-ce 及以上
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