diff --git a/README.md b/README.md
index afe1e7e..98c201d 100644
--- a/README.md
+++ b/README.md
@@ -82,6 +82,7 @@ audio and a reference portrait image. You can also provide a video to achieve fa
 We recommend a python version >=3.10 and cuda version =11.7. Then build environment as follows:
 
 ```shell
+conda install ffmpeg
 pip install -r requirements.txt
 ```
 
@@ -232,4 +233,4 @@ We first thank the authors of [EMO](https://github.com/HumanAIGC/EMO), and part
       archivePrefix={arXiv},
       primaryClass={cs.CV}
 }
-```
\ No newline at end of file
+```