diff --git a/src/FFMpeg/Filters/Video/VideoFilters.php b/src/FFMpeg/Filters/Video/VideoFilters.php
index c00243d..92eaf60 100644
--- a/src/FFMpeg/Filters/Video/VideoFilters.php
+++ b/src/FFMpeg/Filters/Video/VideoFilters.php
@@ -46,7 +46,7 @@ class VideoFilters extends AudioFilters
      * Changes the video framerate.
      *
      * @param FrameRate $framerate
-     * @param type      $gop
+     * @param Integer      $gop
      *
      * @return VideoFilters
      */
diff --git a/src/FFMpeg/Media/Video.php b/src/FFMpeg/Media/Video.php
index 7005e72..a757b21 100644
--- a/src/FFMpeg/Media/Video.php
+++ b/src/FFMpeg/Media/Video.php
@@ -258,7 +258,7 @@ class Video extends Audio
     /**
      * Concatenates a list of videos into one unique video.
      *
-     * @param  string $sources
+     * @param  array $sources
      * @return Concat
      */
     public function concat($sources)