diff --git a/YoutubeParser/Classes/HCYoutubeParser.m b/YoutubeParser/Classes/HCYoutubeParser.m
index 079e05b..37d4f4e 100644
--- a/YoutubeParser/Classes/HCYoutubeParser.m
+++ b/YoutubeParser/Classes/HCYoutubeParser.m
@@ -159,7 +159,7 @@ + (NSDictionary *)h264videosWithYoutubeID:(NSString *)youtubeID {
                             NSMutableDictionary *optionsDict = [NSMutableDictionary dictionary];
                             NSArray *keys = @[//@"author", // youtube channel name
                                               //@"avg_rating", // average ratings on yt when downloaded
-                                              @"iurl", //@"iurlmaxres", @"iurlsd", // thumbnail urls
+                                              @"thumbnail_url",// thumbnail urls
                                               //@"keywords", // author defined keywords
                                               @"length_seconds", // total duration in seconds
                                               @"title", // video title