diff --git a/db_bash_backup-main/config.sh b/db_bash_backup-main/config.sh
index 246cd08..0b068fb 100644
--- a/db_bash_backup-main/config.sh
+++ b/db_bash_backup-main/config.sh
@@ -9,3 +9,6 @@ backup_dir="db_backup"
 
 # List of database names to back up (add any database name separated by a space)
 databases=("db1" "db2" "db3")
+
+# Number of days to retain backup files
+backup_retention_days=7