diff --git a/README.md b/README.md
index 1286308..7ccd80c 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 ### For users
 
 1. Install [Python>=3.9](https://www.python.org/) and [pip](https://pip.pypa.io/)
-2. Install the project by `pip install git+ssh://git@focs.ji.sjtu.edu.cn:2222/JOJ/JOJ3-config-generator.git`
+2. Install/Upgrade the project by `pip install --upgrade git+ssh://git@focs.ji.sjtu.edu.cn:2222/JOJ/JOJ3-config-generator.git`
 3. Run it by `joj3-config-generator --help`
 
 ### For developers