diff --git a/docker-compose.yaml b/docker-compose.yaml
index 43a0373..5000891 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -1,8 +1,8 @@
 version: '3.3'
 
 services:
   gtfs-parser:
     build: .
     command: python parse_gtfs.py
     volumes:
-      - ${DATA_DIR:-./public_data}:/app/public_data
+      - ${DATA_DIR:-./public_data}:/app/public_data:z