diff --git a/src/OpencastApi/Rest/OcPlaylistsApi.php b/src/OpencastApi/Rest/OcPlaylistsApi.php
index b006cdc..b14bef7 100644
--- a/src/OpencastApi/Rest/OcPlaylistsApi.php
+++ b/src/OpencastApi/Rest/OcPlaylistsApi.php
@@ -132,14 +132,16 @@ public function delete($playlistId)
      */
     public function updateEntries($playlistId, $playlistEntries)
     {
-        $uri = self::URI . "/{$playlistId}/entries";
+        $uri = self::URI . "/{$playlistId}";
 
         $formData = [
-            'playlistEntries' => $playlistEntries,
+            'playlist' => [
+                'entries' => $playlistEntries
+            ]
         ];
 
         $options = $this->restClient->getFormParams($formData);
-        return $this->restClient->performPost($uri, $options);
+        return $this->restClient->performPut($uri, $options);
     }
 
     /**
diff --git a/tests/DataProvider/PlaylistsDataProvider.php b/tests/DataProvider/PlaylistsDataProvider.php
index 2576995..ea4884a 100644
--- a/tests/DataProvider/PlaylistsDataProvider.php
+++ b/tests/DataProvider/PlaylistsDataProvider.php
@@ -20,7 +20,7 @@ public static function getPlaylist()
 
     public static function getEntries()
     {
-        return '[{"contentId":"ID-about-opencast","type":"EVENT"},{"contentId":"ID-3d-print","type":"EVENT"}]';
+        return json_decode('[{"contentId":"ID-about-opencast","type":"EVENT"},{"contentId":"ID-3d-print","type":"EVENT"}]');
     }
 }
 ?>