diff --git a/inc/CustomizerImporter.php b/inc/CustomizerImporter.php
index 4ed5cae..be08043 100644
--- a/inc/CustomizerImporter.php
+++ b/inc/CustomizerImporter.php
@@ -84,7 +84,7 @@ public static function import_customizer_options( $import_file_path ) {
 			return $raw;
 		}
 
-		$data = unserialize( $raw );
+		$data = unserialize( $raw , array( 'allowed_classes' => false ) );
 
 		// Data checks.
 		if ( ! is_array( $data ) && ( ! isset( $data['template'] ) || ! isset( $data['mods'] ) ) ) {