diff --git a/Cargo.toml b/Cargo.toml
index b1d19441..f5a91541 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,6 +12,7 @@ description = """
 HTTP cookie parsing and cookie jar management. Supports signed and private
 (encrypted, authenticated) jars.
 """
+include = ["Cargo.toml", "CHANGELOG.md", "README.md", "LICENSE-APACHE", "LICENSE-MIT", "build.rs", "src/**/*.rs"]
 
 [features]
 percent-encode = ["percent-encoding"]
@@ -38,3 +39,6 @@ version_check = "0.9.4"
 
 [package.metadata.docs.rs]
 all-features = true
+
+[lints.rust]
+unexpected_cfgs = { level = "warn", check-cfg = ['cfg(nightly)'] }
diff --git a/src/jar.rs b/src/jar.rs
index 29953103..86940434 100644
--- a/src/jar.rs
+++ b/src/jar.rs
@@ -340,7 +340,7 @@ impl CookieJar {
     /// // Delta contains two new cookies ("new", "yac") and a removal ("name").
     /// assert_eq!(jar.delta().count(), 3);
     /// ```
-    pub fn delta(&self) -> Delta {
+    pub fn delta(&self) -> Delta<'_> {
         Delta { iter: self.delta_cookies.iter() }
     }
 
@@ -374,7 +374,7 @@ impl CookieJar {
     ///     }
     /// }
     /// ```
-    pub fn iter(&self) -> Iter {
+    pub fn iter(&self) -> Iter<'_> {
         Iter {
             delta_cookies: self.delta_cookies.iter()
                 .chain(self.original_cookies.difference(&self.delta_cookies)),
@@ -540,7 +540,7 @@ impl CookieJar {
     /// assert!(matches!(jar.prefixed(Secure).get("h0st"), None));
     /// ```
     #[inline(always)]
-    pub fn prefixed<'a, P: Prefix>(&'a self, prefix: P) -> PrefixedJar<P, &'a Self> {
+    pub fn prefixed<P: Prefix>(&self, prefix: P) -> PrefixedJar<P, &Self> {
         let _ = prefix;
         PrefixedJar::new(self)
     }
@@ -580,7 +580,7 @@ impl CookieJar {
     /// jar.prefixed_mut(Host).remove("one");
     /// assert!(jar.prefixed(Host).get("one").is_none());
     /// ```
-    pub fn prefixed_mut<'a, P: Prefix>(&'a mut self, prefix: P) -> PrefixedJar<P, &'a mut Self> {
+    pub fn prefixed_mut<P: Prefix>(&mut self, prefix: P) -> PrefixedJar<P, &mut Self> {
         let _ = prefix;
         PrefixedJar::new(self)
     }
@@ -614,13 +614,7 @@ impl<'a> Iterator for Iter<'a> {
     type Item = &'a Cookie<'static>;
 
     fn next(&mut self) -> Option<&'a Cookie<'static>> {
-        for cookie in self.delta_cookies.by_ref() {
-            if !cookie.removed {
-                return Some(&*cookie);
-            }
-        }
-
-        None
+        self.delta_cookies.by_ref().find(|&cookie| !cookie.removed).map(|v| v as _)
     }
 }
 
diff --git a/src/lib.rs b/src/lib.rs
index f666d2c3..d491a7a4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -151,7 +151,7 @@ impl<'c> CookieStr<'c> {
                     converting indexed str to str! (This is a module invariant.)");
                 &s[i..j]
             },
-            CookieStr::Concrete(ref cstr) => &*cstr,
+            CookieStr::Concrete(ref cstr) => cstr,
         }
     }
 
diff --git a/src/parse.rs b/src/parse.rs
index b263d915..3e4a4837 100644
--- a/src/parse.rs
+++ b/src/parse.rs
@@ -153,7 +153,7 @@ fn parse_inner<'c>(s: &str, decode: bool) -> Result<Cookie<'c>, ParseError> {
                     v = &v[1..];
                 }
 
-                if !v.chars().all(|d| d.is_digit(10)) {
+                if !v.chars().all(|d| d.is_ascii_digit()) {
                     continue
                 }
 
@@ -164,7 +164,7 @@ fn parse_inner<'c>(s: &str, decode: bool) -> Result<Cookie<'c>, ParseError> {
                 } else {
                     Some(v.parse::<i64>()
                         .map(Duration::seconds)
-                        .unwrap_or_else(|_| Duration::seconds(i64::max_value())))
+                        .unwrap_or_else(|_| Duration::seconds(i64::MAX)))
                 }
             },
             ("domain", Some(d)) if !d.is_empty() => {