diff --git a/docker-compose.sample.yaml b/docker-compose.sample.yaml
index 4135555..ee82616 100644
--- a/docker-compose.sample.yaml
+++ b/docker-compose.sample.yaml
@@ -33,6 +33,7 @@ services:
 
       - PHOTOS_UPLOADS=/srv/profile_pics
       - GTFS_UPLOADS=/srv/gtfs_data
+      - SECRET_KEY='SECRET_SHARED_BACKEND_KEY_QWERTYUIOPASDFGHJKLZXCVBNM'
       - URL_PARADERO=https://tdt-dev.ilab.cl/paradero/?id=
       - TIMEOUT=1200
     volumes: