diff --git a/vault_cron.sh b/vault_cron.sh
index 015996b7..928795da 100755
--- a/vault_cron.sh
+++ b/vault_cron.sh
@@ -2,5 +2,5 @@
 
 ## run by cmc user cron to run the vault inside docker
 
-ID=$(docker ps -q)
+ID=$(docker ps -f ancestor=cmc:latest --format "{{.ID}}" | head -n 1)
 docker exec -t $ID /var/www/cmc-sales/run_vault.sh