diff --git a/delete_old_mail.sh b/delete_old_mail.sh
index 6a91c72..c8a0c71 100755
--- a/delete_old_mail.sh
+++ b/delete_old_mail.sh
@@ -1,7 +1,11 @@
 #!/bin/sh
 
+if [ -z "$DB_PATH" ]; then
+    DB_PATH="db.db"
+fi
+
 min_date="$(date -d '-1 day' +%s)"
 sql="DELETE FROM mails WHERE mails.arrived_at < $min_date;"
 
-echo "$sql" | sqlite3 db.db
+echo "$sql" | sqlite3 "$DB_PATH"