diff --git a/docker-compose.yml b/docker-compose.yml
index 737bc64..499fe75 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,7 +14,7 @@ services:
       - PGDATA=${PGDATA}
       - PGTZ=${PGTZ}
     volumes:
-      - ${POSTGRES_DATA_MNT}:${PGDATA}
+      - ${POSTGRES_DATA_MNT}:${PGDATA}:Z
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -d $${POSTGRES_DB} -U $${POSTGRES_USER}"]
       start_period: 20s
@@ -49,9 +49,9 @@ services:
       - 4242:4242
     volumes:
       - ${ORTHANC_CONFIG:-./config/orthanc}:/etc/orthanc/:ro
-      - ${ORTHANC_DB_MNT:-./volumes/orthanc_db}:/var/lib/orthanc/db
+      - ${ORTHANC_DB_MNT:-./volumes/orthanc_db}:/var/lib/orthanc/db:Z
       - ${ORTHANC_OHIF:-./config/ohif/ohif.js}:/usr/local/share/orthanc/ohif.js:ro
-      - ${ORTHANC_LOG:-./volumes/orthanc_logs}:/etc/orthanc/logs
+      - ${ORTHANC_LOG:-./volumes/orthanc_logs}:/etc/orthanc/logs:Z
     environment:
       VERBOSE_ENABLED: "true"
       VERBOSE_STARTUP: "true"