diff --git a/src/WordpressClient.php b/src/WordpressClient.php
index fd6ac00..c7ace72 100644
--- a/src/WordpressClient.php
+++ b/src/WordpressClient.php
@@ -46,7 +46,7 @@ public function __construct($xmlrpcEndPoint = null, $username = null, $password
     /**
      * Add a callback for `error` event
      *
-     * @param Closure $callback
+     * @param \Closure $callback
      *
      * @since 2.4.0
      */
@@ -58,7 +58,7 @@ function onError($callback)
     /**
      * Add a callback for `sending` event
      *
-     * @param Closure $callback
+     * @param \Closure $callback
      *
      * @since 2.4.0
      */