diff --git a/README.md b/README.md
index 03c103f..73275cb 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 
 
 ## 1 Installation
+Not recommended for `git clone https://www.ikko-lab.k.hosei.ac.jp/gitbucket/git/tsukuba2022/zlac8015d_ros.git`.
 ```
 $ cd catkin_ws/src