diff --git a/packager/hls/base/media_playlist.cc b/packager/hls/base/media_playlist.cc
index 28c58e5df0..e4df80067d 100644
--- a/packager/hls/base/media_playlist.cc
+++ b/packager/hls/base/media_playlist.cc
@@ -273,9 +273,9 @@ bool MediaPlaylist::WriteToFile(media::File* file) {
     SetTargetDuration(ceil(GetLongestSegmentDuration()));
   }
 
-  // EXTINF with floating point duration requires version 4.
+  // KEYFORMAT and KEYFORMATVERSIONS on EXT-X-KEY requires 5 or above.
   std::string header = base::StringPrintf("#EXTM3U\n"
-                                          "#EXT-X-VERSION:4\n"
+                                          "#EXT-X-VERSION:5\n"
                                           "#EXT-X-TARGETDURATION:%d\n",
                                           target_duration_);
   if (type_ == MediaPlaylistType::kVod) {
diff --git a/packager/hls/base/media_playlist_unittest.cc b/packager/hls/base/media_playlist_unittest.cc
index ad894ba31b..fc73465668 100644
--- a/packager/hls/base/media_playlist_unittest.cc
+++ b/packager/hls/base/media_playlist_unittest.cc
@@ -116,7 +116,7 @@ TEST_F(MediaPlaylistTest, WriteToFile) {
   ASSERT_TRUE(media_playlist_.SetMediaInfo(valid_video_media_info_));
   const std::string kExpectedOutput =
       "#EXTM3U\n"
-      "#EXT-X-VERSION:4\n"
+      "#EXT-X-VERSION:5\n"
       "#EXT-X-TARGETDURATION:0\n"
       "#EXT-X-PLAYLIST-TYPE:VOD\n"
       "#EXT-X-ENDLIST\n";
@@ -171,7 +171,7 @@ TEST_F(MediaPlaylistTest, SetTargetDuration) {
   EXPECT_TRUE(media_playlist_.SetTargetDuration(20));
   const std::string kExpectedOutput =
       "#EXTM3U\n"
-      "#EXT-X-VERSION:4\n"
+      "#EXT-X-VERSION:5\n"
       "#EXT-X-TARGETDURATION:20\n"
       "#EXT-X-PLAYLIST-TYPE:VOD\n"
       "#EXT-X-ENDLIST\n";
@@ -197,7 +197,7 @@ TEST_F(MediaPlaylistTest, WriteToFileWithSegments) {
   media_playlist_.AddSegment("file2.ts", 2700000, 5000000);
   const std::string kExpectedOutput =
       "#EXTM3U\n"
-      "#EXT-X-VERSION:4\n"
+      "#EXT-X-VERSION:5\n"
       "#EXT-X-TARGETDURATION:30\n"
       "#EXT-X-PLAYLIST-TYPE:VOD\n"
       "#EXTINF:10.000,\n"
@@ -226,7 +226,7 @@ TEST_F(MediaPlaylistTest, WriteToFileWithEncryptionInfo) {
   media_playlist_.AddSegment("file2.ts", 2700000, 5000000);
   const std::string kExpectedOutput =
       "#EXTM3U\n"
-      "#EXT-X-VERSION:4\n"
+      "#EXT-X-VERSION:5\n"
       "#EXT-X-TARGETDURATION:30\n"
       "#EXT-X-PLAYLIST-TYPE:VOD\n"
       "#EXT-X-KEY:METHOD=SAMPLE-AES,"
@@ -258,7 +258,7 @@ TEST_F(MediaPlaylistTest, WriteToFileWithEncryptionInfoEmptyIv) {
   media_playlist_.AddSegment("file2.ts", 2700000, 5000000);
   const std::string kExpectedOutput =
       "#EXTM3U\n"
-      "#EXT-X-VERSION:4\n"
+      "#EXT-X-VERSION:5\n"
       "#EXT-X-TARGETDURATION:30\n"
       "#EXT-X-PLAYLIST-TYPE:VOD\n"
       "#EXT-X-KEY:METHOD=SAMPLE-AES,"
@@ -288,7 +288,7 @@ TEST_F(MediaPlaylistTest, RemoveOldestSegment) {
 
   const std::string kExpectedOutput =
       "#EXTM3U\n"
-      "#EXT-X-VERSION:4\n"
+      "#EXT-X-VERSION:5\n"
       "#EXT-X-TARGETDURATION:30\n"
       "#EXT-X-PLAYLIST-TYPE:VOD\n"
       "#EXTINF:30.000,\n"