diff --git a/README.md b/README.md
index dae5a5c..dc49b4a 100644
--- a/README.md
+++ b/README.md
@@ -293,7 +293,7 @@ The **MS-Image2Video** project is compatible with the ModelScope codebase, and t
 
 ```bash
 pip install modelscope==1.8.4
-pip install -U xformers
+pip install xformers==0.0.20
 pip install torch==2.0.1
 pip install open_clip_torch>=2.0.2
 pip install opencv-python-headless