diff --git a/README.md b/README.md
index 4f4b8d8..669baf4 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,8 @@ Installation instructions:
 
 ```pip install -r requirements.txt```
 
+You need to install [ffmpeg](https://ffmpeg.org/download.html)
+
 To download voices in advance:
 
 for the tts-1 model: