diff --git a/Cargo.lock b/Cargo.lock
index f4424a9..e6fd0ad 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -271,9 +271,9 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.8.5"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+checksum = "5ca0ecfa931c29007047d1bc58e623ab12e5590e8c7cc53200d5202b69266d8a"
 dependencies = [
  "rand_core",
 ]
diff --git a/purl/src/format.rs b/purl/src/format.rs
index 05f6aa6..56be75f 100644
--- a/purl/src/format.rs
+++ b/purl/src/format.rs
@@ -119,7 +119,7 @@ mod tests {
         impl PurlShape for MyBadPackageType {
             type Error = ParseError;
 
-            fn package_type(&self) -> Cow<str> {
+            fn package_type(&self) -> Cow<'_, str> {
                 Cow::Borrowed("!")
             }
 
diff --git a/purl/src/lib.rs b/purl/src/lib.rs
index a14f8d2..3d8fc01 100644
--- a/purl/src/lib.rs
+++ b/purl/src/lib.rs
@@ -1,5 +1,6 @@
 #![doc = include_str!("../README.md")]
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(docsrs, feature(doc_cfg))]
+#![cfg_attr(docsrs, doc(auto_cfg))]
 
 use std::borrow::Cow;
 
@@ -117,7 +118,7 @@ pub trait PurlShape {
     /// The returned value should be a lower case string. If the returned value
     /// contains invalid characters, `Display` and `to_string` will panic.
     #[must_use]
-    fn package_type(&self) -> Cow<str>;
+    fn package_type(&self) -> Cow<'_, str>;
 
     /// Preview and potentially modify the parts that make up a PURL.
     ///
@@ -136,7 +137,7 @@ pub trait PurlShape {
 impl PurlShape for String {
     type Error = ParseError;
 
-    fn package_type(&self) -> Cow<str> {
+    fn package_type(&self) -> Cow<'_, str> {
         Cow::Borrowed(self)
     }
 
@@ -155,7 +156,7 @@ impl PurlShape for String {
 impl PurlShape for Cow<'_, str> {
     type Error = ParseError;
 
-    fn package_type(&self) -> Cow<str> {
+    fn package_type(&self) -> Cow<'_, str> {
         Cow::Borrowed(self)
     }
 
@@ -188,7 +189,7 @@ where
 {
     type Error = ParseError;
 
-    fn package_type(&self) -> Cow<str> {
+    fn package_type(&self) -> Cow<'_, str> {
         Cow::Borrowed(self)
     }
 
diff --git a/purl/src/package_type.rs b/purl/src/package_type.rs
index ce2f1f3..5b89954 100644
--- a/purl/src/package_type.rs
+++ b/purl/src/package_type.rs
@@ -243,7 +243,7 @@ impl From<UnsupportedPackageType> for PackageError {
 impl PurlShape for PackageType {
     type Error = PackageError;
 
-    fn package_type(&self) -> Cow<str> {
+    fn package_type(&self) -> Cow<'_, str> {
         self.name().into()
     }
 
diff --git a/purl/src/parse.rs b/purl/src/parse.rs
index a13f5bb..4e05336 100644
--- a/purl/src/parse.rs
+++ b/purl/src/parse.rs
@@ -297,7 +297,7 @@ fn decode_namespace(namespace: &str) -> Result<SmallString, ParseError> {
     Ok(rebuilt)
 }
 
-fn decode(input: &str) -> Result<Cow<str>, ParseError> {
+fn decode(input: &str) -> Result<Cow<'_, str>, ParseError> {
     percent_decode_str(input).decode_utf8().map_err(|_| ParseError::InvalidEscape)
 }
 
diff --git a/purl/src/qualifiers.rs b/purl/src/qualifiers.rs
index 84472ea..0e1bd60 100644
--- a/purl/src/qualifiers.rs
+++ b/purl/src/qualifiers.rs
@@ -63,14 +63,14 @@ impl Qualifiers {
     }
 
     /// Iterate over the elements of the list.
-    pub fn iter(&self) -> Iter {
+    pub fn iter(&self) -> Iter<'_> {
         Iter(self.qualifiers.iter())
     }
 
     /// Iterate over the elements of the list.
     ///
     /// Only the value may be mutated.
-    pub fn iter_mut(&mut self) -> IterMut {
+    pub fn iter_mut(&mut self) -> IterMut<'_> {
         IterMut(self.qualifiers.iter_mut())
     }
 
@@ -159,7 +159,7 @@ impl Qualifiers {
     /// This allows obtaining the current value and modifying it or inserting a
     /// new value without needing to search for the qualifier multiple
     /// times.
-    pub fn entry<K>(&mut self, key: K) -> Result<Entry<K>, ParseError>
+    pub fn entry<K>(&mut self, key: K) -> Result<Entry<'_, K>, ParseError>
     where
         K: AsRef<str>,
     {
diff --git a/purl/src/qualifiers/well_known.rs b/purl/src/qualifiers/well_known.rs
index 64d04b5..4c2ff98 100644
--- a/purl/src/qualifiers/well_known.rs
+++ b/purl/src/qualifiers/well_known.rs
@@ -216,7 +216,7 @@ impl Checksum<'_> {
     /// Iterate over the hashes.
     ///
     /// Hashes are returned in no particular order.
-    pub fn iter(&self) -> ChecksumIter {
+    pub fn iter(&self) -> ChecksumIter<'_> {
         ChecksumIter(self.algorithms.iter())
     }
 }
diff --git a/purl_test/src/lib.rs b/purl_test/src/lib.rs
index c75f060..6cb5885 100644
--- a/purl_test/src/lib.rs
+++ b/purl_test/src/lib.rs
@@ -1,6 +1,7 @@
 // This file is autogenerated by generate_tests.rs.
 // Use `cargo xtask codegen` to regenerate it.
 #![cfg(test)]
+#![allow(clippy::needless_question_mark)]
 
 use std::str::FromStr;
 
diff --git a/xtask/src/generate_tests.rs b/xtask/src/generate_tests.rs
index c025b39..4fb404d 100644
--- a/xtask/src/generate_tests.rs
+++ b/xtask/src/generate_tests.rs
@@ -83,6 +83,8 @@ pub fn main() {
     writeln!(file, "// This file is autogenerated by generate_tests.rs.").unwrap();
     writeln!(file, "// Use `cargo xtask codegen` to regenerate it.").unwrap();
     writeln!(file, "#![cfg(test)]").unwrap();
+    // Sometimes it is needed and sometimes it isn't.
+    writeln!(file, "#![allow(clippy::needless_question_mark)]").unwrap();
     writeln!(file).unwrap();
     writeln!(file, "{}", prettyplease::unparse(&suite)).unwrap();
 }