diff --git a/README.md b/README.md
index fffe678de..2d6fb4076 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ Our codebase is based on **Python3.6**. There are a few dependencies to run the
 - Python (>=3.6)
 - [PyTorch](http://pytorch.org/) (Release version 0.4.0)
 - [Openpose](https://github.com/CMU-Perceptual-Computing-Lab/openpose) (Optional: for demo only)
-- FFmpeg (Optional: for demo only)
+- FFmpeg (Optional: for demo only), which can be installed by `sudo apt-get install ffmpeg`
 - Other Python libraries can be installed by `pip install -r requirements.txt`
 
 ### Installation