diff --git a/entrypoint.sh.tmpl b/entrypoint.sh.tmpl
index 6692448..56b14ec 100644
--- a/entrypoint.sh.tmpl
+++ b/entrypoint.sh.tmpl
@@ -37,7 +37,7 @@ main() {
 
 main
 
-export CMD_DB_URL=postgres://$CMD_DB_USER:$CMD_DB_PASSWORD@$CMD_DB_HOST:5432/$CMD_DB_NAME
+export CMD_DB_URL="${CMD_DB_URL:-postgres://$CMD_DB_USER:$CMD_DB_PASSWORD@$CMD_DB_HOST:5432/$CMD_DB_NAME}"
 
 # 3wc: `source /docker-entrypoint.sh -e` to load CMD_DB_URL for CLI scripts
 if [ ! "${1-}" == "-e" ]; then