diff --git a/docker-compose.yml b/docker-compose.yml
index ec65513..c747596 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -38,6 +38,7 @@ services:
     command:
       - |
         mkdir -p /backup/wal /backup/full
+        chown 999:999 /backup/wal
         while true; do
           STAMP=$$(date +%Y-%m-%d_%H-%M-%S)
           echo "Starting full backup: full_$$STAMP"