diff --git a/src/converter/ddr2osu.rs b/src/converter/ddr2osu.rs
index 7964577..6f0d97d 100644
--- a/src/converter/ddr2osu.rs
+++ b/src/converter/ddr2osu.rs
@@ -20,7 +20,7 @@ impl ConfigRange {
 }
 
 impl fmt::Display for ConfigRange {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "{}:{}", self.0, self.1)
     }
 }
@@ -89,7 +89,7 @@ pub struct ConfigMetadata {
 }
 
 impl fmt::Display for Config {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "ddr2osu ({}shock→{:?} hp{} acc{})",
diff --git a/src/ddr/ssq.rs b/src/ddr/ssq.rs
index ea523f7..0526f00 100644
--- a/src/ddr/ssq.rs
+++ b/src/ddr/ssq.rs
@@ -65,7 +65,7 @@ impl Into<Vec<bool>> for PlayerRow {
 }
 
 impl fmt::Display for PlayerRow {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "{}{}{}{}",
@@ -98,7 +98,7 @@ impl Into<Vec<bool>> for Row {
 }
 
 impl fmt::Display for Row {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let player_rows = match self {
             Self::Single(player_row) => vec![player_row],
             Self::Double(player_row1, player_row2) => vec![player_row1, player_row2],
@@ -412,7 +412,7 @@ impl TryFrom<u16> for Level {
 }
 
 impl fmt::Display for Level {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let players = match self.players {
             1 => "Single",
             2 => "Double",
diff --git a/src/lib.rs b/src/lib.rs
index 7b7568c..93001ad 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
 #![warn(clippy::cast_lossless)]
+#![warn(rust_2018_idioms)]
 
 #[cfg(test)]
 #[macro_use(quickcheck)]
diff --git a/src/osu/beatmap.rs b/src/osu/beatmap.rs
index 9916a14..8578e82 100644
--- a/src/osu/beatmap.rs
+++ b/src/osu/beatmap.rs
@@ -129,7 +129,7 @@ pub struct General {
 }
 
 impl fmt::Display for General {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "\
@@ -155,7 +155,7 @@ impl fmt::Display for General {
 pub struct Editor;
 
 impl fmt::Display for Editor {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(f, "[Editor]")
     }
 }
@@ -175,7 +175,7 @@ pub struct Metadata {
 }
 
 impl fmt::Display for Metadata {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "\
@@ -238,7 +238,7 @@ impl DifficultyBuilder {
 }
 
 impl fmt::Display for Difficulty {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "\
@@ -264,7 +264,7 @@ impl fmt::Display for Difficulty {
 pub struct Events(pub Vec<Event>);
 
 impl fmt::Display for Events {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "\
@@ -296,7 +296,7 @@ pub enum Event {
 }
 
 impl fmt::Display for Event {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             Event::Background {
                 filename,
@@ -325,7 +325,7 @@ impl fmt::Display for Event {
 pub struct TimingPoints(pub Vec<TimingPoint>);
 
 impl fmt::Display for TimingPoints {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "\
@@ -344,7 +344,7 @@ pub struct TimingPointEffects {
 }
 
 impl fmt::Display for TimingPointEffects {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "{}",
@@ -381,7 +381,7 @@ pub struct TimingPoint {
 }
 
 impl fmt::Display for TimingPoint {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "{},{},{},{},{},{},{},{}",
@@ -401,7 +401,7 @@ impl fmt::Display for TimingPoint {
 pub struct Colours(pub Vec<Colour>);
 
 impl fmt::Display for Colours {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "\
@@ -421,7 +421,7 @@ pub enum ColourScope {
 }
 
 impl fmt::Display for ColourScope {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             ColourScope::Combo(i) => write!(f, "Combo{}", i),
             _ => write!(f, "{:?}", self),
@@ -436,7 +436,7 @@ pub struct Colour {
 }
 
 impl fmt::Display for Colour {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "{} : {}",
@@ -447,7 +447,7 @@ impl fmt::Display for Colour {
 }
 
 impl fmt::Display for HitSound {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "{}",
@@ -466,7 +466,7 @@ impl fmt::Display for HitSound {
 }
 
 impl fmt::Display for HitSample {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "{}:{}:{}:{}:{}",
@@ -483,7 +483,7 @@ impl fmt::Display for HitSample {
 pub struct HitObjects(pub Vec<HitObject>);
 
 impl fmt::Display for HitObjects {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "\
@@ -513,7 +513,7 @@ pub struct Beatmap {
 }
 
 impl fmt::Display for Beatmap {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(
             f,
             "osu file format v{}\n\n{}\n{}\n{}\n{}\n{}\n{}\n{}\n{}",
diff --git a/src/osu/beatmap/hit_object.rs b/src/osu/beatmap/hit_object.rs
index cee5331..fc7c6c8 100644
--- a/src/osu/beatmap/hit_object.rs
+++ b/src/osu/beatmap/hit_object.rs
@@ -84,7 +84,7 @@ impl HitObject {
 }
 
 impl fmt::Display for HitObject {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
             HitObject::HitCircle(HitCircle {
                 x,
diff --git a/src/xact3/xwb.rs b/src/xact3/xwb.rs
index e98dc96..b8d95b3 100644
--- a/src/xact3/xwb.rs
+++ b/src/xact3/xwb.rs
@@ -193,7 +193,7 @@ pub struct WaveBank<'a> {
 }
 
 impl WaveBank<'_> {
-    pub fn parse(data: &'_ [u8]) -> Result<WaveBank, Error> {
+    pub fn parse(data: &'_ [u8]) -> Result<WaveBank<'_>, Error> {
         debug!("Parsing header");
         let header = Header::parse(mini_parser::get_slice_range(data, 0..52)?)?;