diff --git a/src/Nexucis/Elasticsearch/Helper/Nodowntime/IndexHelper.php b/src/Nexucis/Elasticsearch/Helper/Nodowntime/IndexHelper.php
index 2e9bd79..3c969ec 100644
--- a/src/Nexucis/Elasticsearch/Helper/Nodowntime/IndexHelper.php
+++ b/src/Nexucis/Elasticsearch/Helper/Nodowntime/IndexHelper.php
@@ -83,7 +83,7 @@ public function createIndexByAlias($alias)
     }
 
     /**
-     * @param $alias : alias can put here [REQUIRED]
+     * @param $alias : alias [REQUIRED]
      * @return void
      * @throws IndexNotFoundException
      */
diff --git a/src/Nexucis/Elasticsearch/Helper/Nodowntime/IndexHelperInterface.php b/src/Nexucis/Elasticsearch/Helper/Nodowntime/IndexHelperInterface.php
index 3c90337..4ca820d 100644
--- a/src/Nexucis/Elasticsearch/Helper/Nodowntime/IndexHelperInterface.php
+++ b/src/Nexucis/Elasticsearch/Helper/Nodowntime/IndexHelperInterface.php
@@ -35,7 +35,7 @@ public function existsIndex($index);
     public function createIndexByAlias($alias);
 
     /**
-     * @param $alias : alias can put here [REQUIRED]
+     * @param string $alias [REQUIRED]
      * @return void
      * @throws IndexNotFoundException
      */