diff --git a/README.md b/README.md
index 2747e87..aeb41f3 100644
--- a/README.md
+++ b/README.md
@@ -13,4 +13,5 @@ convert all files to opus
 ```bash to_opus.sh -e "*"```
 
 ### Dependencies
-- ffmpeg
\ No newline at end of file
+- ffmpeg
+- Bash 4^
\ No newline at end of file