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diff --git a/README.md b/README.md
index f1570cc..342dad3 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,8 @@ Now you set up some env variables:
 - `UNREALSPEECH_TOKEN`: used by [Unrealspeech](https://unrealspeech.com) for
   text-to-speach API.
 
+- `AUDIO_PATH`: folder path where to store audios
+
 After that you must copy the `schema/init.sql` file into the database.
 
 Now just run the app