diff --git a/src/deserializers.rs b/src/deserializers.rs
index de83c19..ec7c052 100644
--- a/src/deserializers.rs
+++ b/src/deserializers.rs
@@ -1,6 +1,5 @@
 use de::Visitor;
-use serde::de;
-use serde::Deserializer;
+use serde::{de, Deserializer};
 
 pub fn bool_from_str_or_bool<'de, D>(deserializer: D) -> Result<bool, D::Error>
 where
@@ -11,7 +10,7 @@ where
 
 struct BoolOrStringVisitor;
 
-impl<'de> Visitor<'de> for BoolOrStringVisitor {
+impl Visitor<'_> for BoolOrStringVisitor {
     type Value = bool;
 
     fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
diff --git a/src/error.rs b/src/error.rs
index 8ca0bcc..3dbabb4 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -72,7 +72,7 @@ pub enum OAuth2ErrorCode {
     Unrecognized(String),
 }
 
-impl<'a> From<&'a str> for OAuth2ErrorCode {
+impl From<&str> for OAuth2ErrorCode {
     fn from(s: &str) -> OAuth2ErrorCode {
         match s {
             "invalid_request" => OAuth2ErrorCode::InvalidRequest,
@@ -99,9 +99,6 @@ pub enum ClientError {
     /// JSON error.
     Json(serde_json::Error),
 
-    /// Response parse error.
-    //    Parse(ParseError),
-
     /// OAuth 2.0 error.
     OAuth2(OAuth2Error),