diff --git a/benches/bench.rs b/benches/bench.rs
index 8929fab..ccd05d0 100644
--- a/benches/bench.rs
+++ b/benches/bench.rs
@@ -7,8 +7,8 @@ extern crate bit_set;
 use std::iter::FromIterator;
 
 use criterion::Criterion;
-use rand::{Rng, SeedableRng};
 use rand::rngs::SmallRng;
+use rand::{Rng, SeedableRng};
 
 use bit_set::BitSet;
 
diff --git a/src/lib.rs b/src/lib.rs
index a4dddde..8a60ab8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,7 @@
 extern crate hashbrown;
-#[cfg(feature="rayon")]
+#[cfg(feature = "rayon")]
 extern crate rayon;
-#[cfg(feature="serde")]
+#[cfg(feature = "serde")]
 extern crate serde;
 extern crate unreachable;
 
@@ -11,13 +11,13 @@ use std::iter::{FromIterator, IntoIterator, Iterator};
 use std::ops;
 
 use hashbrown::HashMap;
-#[cfg(feature="rayon")]
+#[cfg(feature = "rayon")]
 use rayon::iter::{FromParallelIterator, IntoParallelIterator, ParallelExtend, ParallelIterator};
-#[cfg(feature="serde")]
+#[cfg(feature = "serde")]
 use serde::{
-    {Deserialize, Deserializer, Serialize, Serializer},
     de::{SeqAccess, Visitor},
     ser::SerializeSeq,
+    {Deserialize, Deserializer, Serialize, Serializer},
 };
 
 const BITS: u64 = 64;
@@ -382,7 +382,7 @@ impl Iterator for IntoIter {
     }
 }
 
-#[cfg(feature="rayon")]
+#[cfg(feature = "rayon")]
 impl ParallelExtend<u64> for BitSet {
     fn par_extend<I>(&mut self, par_iter: I)
     where
@@ -406,7 +406,7 @@ impl ParallelExtend<u64> for BitSet {
     }
 }
 
-#[cfg(feature="rayon")]
+#[cfg(feature = "rayon")]
 impl FromParallelIterator<u64> for BitSet {
     fn from_par_iter<I>(par_iter: I) -> Self
     where
@@ -418,7 +418,7 @@ impl FromParallelIterator<u64> for BitSet {
     }
 }
 
-#[cfg(feature="serde")]
+#[cfg(feature = "serde")]
 impl Serialize for BitSet {
     #[inline]
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
@@ -433,7 +433,7 @@ impl Serialize for BitSet {
     }
 }
 
-#[cfg(feature="serde")]
+#[cfg(feature = "serde")]
 impl<'de> Deserialize<'de> for BitSet {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where