diff --git a/src/Command/BaseMigrateCommand.php b/src/Command/BaseMigrateCommand.php
index 879fc2a..a313f90 100644
--- a/src/Command/BaseMigrateCommand.php
+++ b/src/Command/BaseMigrateCommand.php
@@ -46,7 +46,7 @@ protected function getMigrationPath(): string
         return $this->migrationPath;
     }
 
-    protected function getMigrationPaths(InputInterface $input = null): array
+    protected function getMigrationPaths(?InputInterface $input = null): array
     {
         if (null !== $input && $input->hasOption('path') && null !== $path = $input->getOption('path')) {
             return [getcwd().'/'.$path];