diff --git a/src/Commands/MigrateCommands.php b/src/Commands/MigrateCommands.php
index 8ce8c6e..d2b44fa 100644
--- a/src/Commands/MigrateCommands.php
+++ b/src/Commands/MigrateCommands.php
@@ -90,7 +90,7 @@ public function batchImport($migration_names = '', array $options = [
   /**
    * {@inheritdoc}
    */
-  protected function executeMigration(MigrationInterface $migration, $migration_id, array $options = []) {
+  protected function executeMigration(MigrationInterface $migration, $migration_id, array $options = []): void {
     // Keep track of all migrations run during this command so the same
     // migration is not run multiple times.
     static $executed_migrations = [];
@@ -232,7 +232,7 @@ public function rollback($migration_names = '', array $options = [
     'skip-progress-bar' => FALSE,
     'continue-on-failure' => FALSE,
     'statuses' => self::REQ,
-  ]) {
+  ]): void {
     $group_names = $options['group'];
     $tag_names = $options['tag'];
     $all = $options['all'];