diff --git a/src/error.rs b/src/error.rs
index c661819..eaf3645 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -165,17 +165,6 @@ impl Error {
 
     pub(crate) fn io<T: ToString>(value: T) -> Self { Self::from(ErrorKind::Io(value.to_string())) }
 
-    pub(crate) fn required_version<T, U>(required_version: T, specified_version: U) -> Self
-    where
-        T: ToString,
-        U: ToString,
-    {
-        Self::from(ErrorKind::VersionError(
-            required_version.to_string(),
-            specified_version.to_string(),
-        ))
-    }
-
     pub(crate) fn builder_error<T: ToString>(value: T) -> Self {
         Self::from(ErrorKind::BuilderError(value.to_string()))
     }
diff --git a/src/lib.rs b/src/lib.rs
index 2996b1a..2fc3c24 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -44,6 +44,8 @@ pub use media_segment::{MediaSegment, MediaSegmentBuilder};
 pub mod tags;
 pub mod types;
 
+#[macro_use]
+mod utils;
 mod attribute;
 mod error;
 mod line;
@@ -51,7 +53,6 @@ mod master_playlist;
 mod media_playlist;
 mod media_segment;
 mod traits;
-mod utils;
 
 pub use error::Result;
 pub use traits::*;
diff --git a/src/master_playlist.rs b/src/master_playlist.rs
index 8c4e295..ff2a944 100644
--- a/src/master_playlist.rs
+++ b/src/master_playlist.rs
@@ -17,8 +17,6 @@ use crate::{Error, RequiredVersion};
 #[builder(setter(into, strip_option))]
 /// Master playlist.
 pub struct MasterPlaylist {
-    #[builder(default, setter(skip))]
-    version_tag: ExtXVersion,
     #[builder(default)]
     /// Sets the [`ExtXIndependentSegments`] tag.
     ///
@@ -199,17 +197,6 @@ impl MasterPlaylist {
     }
 }
 
-macro_rules! required_version {
-    ( $( $tag:expr ),* ) => {
-        ::core::iter::empty()
-            $(
-                .chain(::core::iter::once($tag.required_version()))
-            )*
-            .max()
-            .unwrap_or_default()
-    }
-}
-
 impl RequiredVersion for MasterPlaylist {
     fn required_version(&self) -> ProtocolVersion {
         required_version![
@@ -392,8 +379,6 @@ impl FromStr for MasterPlaylist {
                             // This tag can be ignored, because the
                             // MasterPlaylist will automatically set the
                             // ExtXVersion tag to correct version!
-
-                            // builder.version(t.version());
                         }
                         Tag::ExtInf(_)
                         | Tag::ExtXByteRange(_)
diff --git a/src/media_playlist.rs b/src/media_playlist.rs
index dba09db..dc360df 100644
--- a/src/media_playlist.rs
+++ b/src/media_playlist.rs
@@ -1,5 +1,4 @@
 use std::fmt;
-use std::iter;
 use std::str::FromStr;
 use std::time::Duration;
 
@@ -19,15 +18,6 @@ use crate::{Encrypted, Error, RequiredVersion};
 #[builder(build_fn(validate = "Self::validate"))]
 #[builder(setter(into, strip_option))]
 pub struct MediaPlaylist {
-    /// Sets the protocol compatibility version of the resulting playlist.
-    ///
-    /// If the resulting playlist has tags which requires a compatibility
-    /// version greater than `version`,
-    /// `build()` method will fail with an `ErrorKind::InvalidInput` error.
-    ///
-    /// The default is the maximum version among the tags in the playlist.
-    #[builder(setter(name = "version"))]
-    version_tag: ExtXVersion,
     /// Sets the [`ExtXTargetDuration`] tag.
     target_duration_tag: ExtXTargetDuration,
     #[builder(default)]
@@ -68,13 +58,6 @@ pub struct MediaPlaylist {
 
 impl MediaPlaylistBuilder {
     fn validate(&self) -> Result<(), String> {
-        let required_version = self.required_version();
-        let specified_version = self.version_tag.map_or(required_version, |p| p.version());
-
-        if required_version > specified_version {
-            return Err(Error::required_version(required_version, specified_version).to_string());
-        }
-
         if let Some(target_duration) = &self.target_duration_tag {
             self.validate_media_segments(target_duration.duration())
                 .map_err(|e| e.to_string())?;
@@ -89,10 +72,12 @@ impl MediaPlaylistBuilder {
             for s in segments {
                 // CHECK: `#EXT-X-TARGETDURATION`
                 let segment_duration = s.inf_tag().duration();
-                let rounded_segment_duration = if segment_duration.subsec_nanos() < 500_000_000 {
-                    Duration::from_secs(segment_duration.as_secs())
-                } else {
-                    Duration::from_secs(segment_duration.as_secs() + 1)
+                let rounded_segment_duration = {
+                    if segment_duration.subsec_nanos() < 500_000_000 {
+                        Duration::from_secs(segment_duration.as_secs())
+                    } else {
+                        Duration::from_secs(segment_duration.as_secs() + 1)
+                    }
                 };
 
                 let max_segment_duration = {
@@ -149,62 +134,17 @@ impl MediaPlaylistBuilder {
 
 impl RequiredVersion for MediaPlaylistBuilder {
     fn required_version(&self) -> ProtocolVersion {
-        iter::empty()
-            .chain(
-                self.target_duration_tag
-                    .iter()
-                    .map(|p| p.required_version()),
-            )
-            .chain(
-                self.media_sequence_tag
-                    .flatten()
-                    .iter()
-                    .map(|p| p.required_version()),
-            )
-            .chain(
-                self.discontinuity_sequence_tag
-                    .flatten()
-                    .iter()
-                    .map(|p| p.required_version()),
-            )
-            .chain(
-                self.playlist_type_tag
-                    .flatten()
-                    .iter()
-                    .map(|p| p.required_version()),
-            )
-            .chain(
-                self.i_frames_only_tag
-                    .flatten()
-                    .iter()
-                    .map(|p| p.required_version()),
-            )
-            .chain(
-                self.independent_segments_tag
-                    .flatten()
-                    .iter()
-                    .map(|p| p.required_version()),
-            )
-            .chain(
-                self.start_tag
-                    .flatten()
-                    .iter()
-                    .map(|p| p.required_version()),
-            )
-            .chain(
-                self.end_list_tag
-                    .flatten()
-                    .iter()
-                    .map(|p| p.required_version()),
-            )
-            .chain(self.segments.iter().map(|t| {
-                t.iter()
-                    .map(|p| p.required_version())
-                    .max()
-                    .unwrap_or(ProtocolVersion::V1)
-            }))
-            .max()
-            .unwrap_or_else(ProtocolVersion::latest)
+        required_version![
+            self.target_duration_tag,
+            self.media_sequence_tag,
+            self.discontinuity_sequence_tag,
+            self.playlist_type_tag,
+            self.i_frames_only_tag,
+            self.independent_segments_tag,
+            self.start_tag,
+            self.end_list_tag,
+            self.segments
+        ]
     }
 }
 
@@ -212,9 +152,6 @@ impl MediaPlaylist {
     /// Returns a builder for [`MediaPlaylist`].
     pub fn builder() -> MediaPlaylistBuilder { MediaPlaylistBuilder::default() }
 
-    /// Returns the [`ExtXVersion`] tag contained in the playlist.
-    pub const fn version_tag(&self) -> ExtXVersion { self.version_tag }
-
     /// Returns the [`ExtXTargetDuration`] tag contained in the playlist.
     pub const fn target_duration_tag(&self) -> ExtXTargetDuration { self.target_duration_tag }
 
@@ -248,11 +185,27 @@ impl MediaPlaylist {
     pub const fn segments(&self) -> &Vec<MediaSegment> { &self.segments }
 }
 
+impl RequiredVersion for MediaPlaylist {
+    fn required_version(&self) -> ProtocolVersion {
+        required_version![
+            self.target_duration_tag,
+            self.media_sequence_tag,
+            self.discontinuity_sequence_tag,
+            self.playlist_type_tag,
+            self.i_frames_only_tag,
+            self.independent_segments_tag,
+            self.start_tag,
+            self.end_list_tag,
+            self.segments
+        ]
+    }
+}
+
 impl fmt::Display for MediaPlaylist {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         writeln!(f, "{}", ExtM3u)?;
-        if self.version_tag.version() != ProtocolVersion::V1 {
-            writeln!(f, "{}", self.version_tag)?;
+        if self.required_version() != ProtocolVersion::V1 {
+            writeln!(f, "{}", ExtXVersion::new(self.required_version()))?;
         }
         writeln!(f, "{}", self.target_duration_tag)?;
         if let Some(value) = &self.media_sequence_tag {
@@ -292,9 +245,8 @@ fn parse_media_playlist(
 
     let mut has_partial_segment = false;
     let mut has_discontinuity_tag = false;
-    let mut has_version = false; // m3u8 files without ExtXVersion tags are ProtocolVersion::V1
 
-    let mut available_key_tags = vec![];
+    let mut available_key_tags: Vec<crate::tags::ExtXKey> = vec![];
 
     for (i, line) in input.parse::<Lines>()?.into_iter().enumerate() {
         match line {
@@ -307,10 +259,6 @@ fn parse_media_playlist(
                 }
                 match tag {
                     Tag::ExtM3u(_) => return Err(Error::invalid_input()),
-                    Tag::ExtXVersion(t) => {
-                        builder.version(t.version());
-                        has_version = true;
-                    }
                     Tag::ExtInf(t) => {
                         has_partial_segment = true;
                         segment.inf_tag(t);
@@ -326,9 +274,7 @@ fn parse_media_playlist(
                     }
                     Tag::ExtXKey(t) => {
                         has_partial_segment = true;
-                        if !available_key_tags.is_empty() {
-                            available_key_tags.push(t);
-                        } else {
+                        if available_key_tags.is_empty() {
                             // An ExtXKey applies to every MediaSegment and to every Media
                             // Initialization Section declared by an EXT-X-MAP tag, that appears
                             // between it and the next EXT-X-KEY tag in the Playlist file with the
@@ -343,6 +289,8 @@ fn parse_media_playlist(
                                     }
                                 })
                                 .collect();
+                        } else {
+                            available_key_tags.push(t);
                         }
                     }
                     Tag::ExtXMap(mut t) => {
@@ -396,7 +344,7 @@ fn parse_media_playlist(
                     Tag::ExtXStart(t) => {
                         builder.start_tag(t);
                     }
-                    Tag::Unknown(_) => {
+                    Tag::Unknown(_) | Tag::ExtXVersion(_) => {
                         // [6.3.1. General Client Responsibilities]
                         // > ignore any unrecognized tags.
                     }
@@ -416,10 +364,6 @@ fn parse_media_playlist(
         return Err(Error::invalid_input());
     }
 
-    if !has_version {
-        builder.version(ProtocolVersion::V1);
-    }
-
     builder.segments(segments);
     builder.build().map_err(Error::builder_error)
 }
diff --git a/src/media_segment.rs b/src/media_segment.rs
index 7e3722d..2efa2b8 100644
--- a/src/media_segment.rs
+++ b/src/media_segment.rs
@@ -1,5 +1,4 @@
 use std::fmt;
-use std::iter;
 
 use derive_builder::Builder;
 
@@ -37,6 +36,99 @@ pub struct MediaSegment {
     uri: String,
 }
 
+impl MediaSegment {
+    /// Returns a Builder for a [`MasterPlaylist`].
+    pub fn builder() -> MediaSegmentBuilder { MediaSegmentBuilder::default() }
+
+    /// Returns the `URI` of the media segment.
+    pub const fn uri(&self) -> &String { &self.uri }
+
+    /// Sets the `URI` of the media segment.
+    pub fn set_uri<T>(&mut self, value: T) -> &mut Self
+    where
+        T: Into<String>,
+    {
+        self.uri = value.into();
+        self
+    }
+
+    /// Returns the [`ExtInf`] tag associated with the media segment.
+    pub const fn inf_tag(&self) -> &ExtInf { &self.inf_tag }
+
+    /// Sets the [`ExtInf`] tag associated with the media segment.
+    pub fn set_inf_tag<T>(&mut self, value: T) -> &mut Self
+    where
+        T: Into<ExtInf>,
+    {
+        self.inf_tag = value.into();
+        self
+    }
+
+    /// Returns the [`ExtXByteRange`] tag associated with the media segment.
+    pub const fn byte_range_tag(&self) -> Option<ExtXByteRange> { self.byte_range_tag }
+
+    /// Sets the [`ExtXByteRange`] tag associated with the media segment.
+    pub fn set_byte_range_tag<T>(&mut self, value: Option<T>) -> &mut Self
+    where
+        T: Into<ExtXByteRange>,
+    {
+        self.byte_range_tag = value.map(Into::into);
+        self
+    }
+
+    /// Returns the [`ExtXDateRange`] tag associated with the media segment.
+    pub const fn date_range_tag(&self) -> &Option<ExtXDateRange> { &self.date_range_tag }
+
+    /// Sets the [`ExtXDateRange`] tag associated with the media segment.
+    pub fn set_date_range_tag<T>(&mut self, value: Option<T>) -> &mut Self
+    where
+        T: Into<ExtXDateRange>,
+    {
+        self.date_range_tag = value.map(Into::into);
+        self
+    }
+
+    /// Returns the [`ExtXDiscontinuity`] tag associated with the media segment.
+    pub const fn discontinuity_tag(&self) -> Option<ExtXDiscontinuity> { self.discontinuity_tag }
+
+    /// Sets the [`ExtXDiscontinuity`] tag associated with the media segment.
+    pub fn set_discontinuity_tag<T>(&mut self, value: Option<T>) -> &mut Self
+    where
+        T: Into<ExtXDiscontinuity>,
+    {
+        self.discontinuity_tag = value.map(Into::into);
+        self
+    }
+
+    /// Returns the [`ExtXProgramDateTime`] tag associated with the media
+    /// segment.
+    pub const fn program_date_time_tag(&self) -> Option<ExtXProgramDateTime> {
+        self.program_date_time_tag
+    }
+
+    /// Sets the [`ExtXProgramDateTime`] tag associated with the media
+    /// segment.
+    pub fn set_program_date_time_tag<T>(&mut self, value: Option<T>) -> &mut Self
+    where
+        T: Into<ExtXProgramDateTime>,
+    {
+        self.program_date_time_tag = value.map(Into::into);
+        self
+    }
+
+    /// Returns the [`ExtXMap`] tag associated with the media segment.
+    pub const fn map_tag(&self) -> &Option<ExtXMap> { &self.map_tag }
+
+    /// Sets the [`ExtXMap`] tag associated with the media segment.
+    pub fn set_map_tag<T>(&mut self, value: Option<T>) -> &mut Self
+    where
+        T: Into<ExtXMap>,
+    {
+        self.map_tag = value.map(Into::into);
+        self
+    }
+}
+
 impl MediaSegmentBuilder {
     /// Pushes an [`ExtXKey`] tag.
     pub fn push_key_tag<VALUE: Into<ExtXKey>>(&mut self, value: VALUE) -> &mut Self {
@@ -75,51 +167,17 @@ impl fmt::Display for MediaSegment {
     }
 }
 
-impl MediaSegment {
-    /// Creates a [`MediaSegmentBuilder`].
-    pub fn builder() -> MediaSegmentBuilder { MediaSegmentBuilder::default() }
-
-    /// Returns the `URI` of the media segment.
-    pub const fn uri(&self) -> &String { &self.uri }
-
-    /// Returns the [`ExtInf`] tag associated with the media segment.
-    pub const fn inf_tag(&self) -> &ExtInf { &self.inf_tag }
-
-    /// Returns the [`ExtXByteRange`] tag associated with the media segment.
-    pub const fn byte_range_tag(&self) -> Option<ExtXByteRange> { self.byte_range_tag }
-
-    /// Returns the [`ExtXDateRange`] tag associated with the media segment.
-    pub const fn date_range_tag(&self) -> &Option<ExtXDateRange> { &self.date_range_tag }
-
-    /// Returns the [`ExtXDiscontinuity`] tag associated with the media segment.
-    pub const fn discontinuity_tag(&self) -> Option<ExtXDiscontinuity> { self.discontinuity_tag }
-
-    /// Returns the [`ExtXProgramDateTime`] tag associated with the media
-    /// segment.
-    pub const fn program_date_time_tag(&self) -> Option<ExtXProgramDateTime> {
-        self.program_date_time_tag
-    }
-
-    /// Returns the [`ExtXMap`] tag associated with the media segment.
-    pub const fn map_tag(&self) -> &Option<ExtXMap> { &self.map_tag }
-}
-
 impl RequiredVersion for MediaSegment {
     fn required_version(&self) -> ProtocolVersion {
-        iter::empty()
-            .chain(self.keys.iter().map(|t| t.required_version()))
-            .chain(self.map_tag.iter().map(|t| t.required_version()))
-            .chain(self.byte_range_tag.iter().map(|t| t.required_version()))
-            .chain(self.date_range_tag.iter().map(|t| t.required_version()))
-            .chain(self.discontinuity_tag.iter().map(|t| t.required_version()))
-            .chain(
-                self.program_date_time_tag
-                    .iter()
-                    .map(|t| t.required_version()),
-            )
-            .chain(iter::once(self.inf_tag.required_version()))
-            .max()
-            .unwrap_or_else(ProtocolVersion::latest)
+        required_version![
+            self.keys,
+            self.map_tag,
+            self.byte_range_tag,
+            self.date_range_tag,
+            self.discontinuity_tag,
+            self.program_date_time_tag,
+            self.inf_tag
+        ]
     }
 }
 
diff --git a/src/utils.rs b/src/utils.rs
index a48a2eb..9eb7fae 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,5 +1,16 @@
 use crate::Error;
 
+macro_rules! required_version {
+    ( $( $tag:expr ),* ) => {
+        ::core::iter::empty()
+            $(
+                .chain(::core::iter::once($tag.required_version()))
+            )*
+            .max()
+            .unwrap_or_default()
+    }
+}
+
 macro_rules! impl_from {
     ( $($( $type:tt ),* => $target:path ),* ) => {
         use ::core::convert::From;