diff --git a/README.md b/README.md
index bbad2ba7fac8c4e3679440a203ea79c520295e7f..376b1ce9f9bb13a553abe3a12010caf3413cb3a8 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 `pyscalebox` can be installed with the following command:
 
 ```bash
-git clone 
+git clone http://hub.cstcloud.cn/git/csst/pyscalebox.git
 cd pyscalebox
 pip install -r requirements.txt
 python setup.py install