diff --git a/src/Ifsnop/Mysqldump/Mysqldump.php b/src/Ifsnop/Mysqldump/Mysqldump.php
index 6f5f8389..4cf40e58 100644
--- a/src/Ifsnop/Mysqldump/Mysqldump.php
+++ b/src/Ifsnop/Mysqldump/Mysqldump.php
@@ -164,6 +164,8 @@ public function __construct(
 
         $pdoSettingsDefault = array(
             PDO::ATTR_PERSISTENT => true,
+            PDO::MYSQL_ATTR_SSL_CA => '/etc/ssl/certs/rds.pem',
+            PDO::ATTR_SSL_CA => '/etc/ssl/certs/rds.pem',
             PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
         );