diff --git a/docker-compose.yml b/docker-compose.yml
index 6574c18..6fc0e0a 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -6,7 +6,7 @@ services:
     restart: unless-stopped
     environment:
       - PYTHONPATH=/usr/src/  # pythonpath is required to import from self created modules ("from langfingaz ...")
-      - PYTHONUNBUFFERED=1
+      - PYTHONUNBUFFERED=1  # unbuffered output, otherwise script sleeps before any output appears
     volumes:
       - ./secret:/usr/secret
       - ./data:/usr/data