diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7fe69f7..7b13916 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions-rs/toolchain@v1
       with:
-        toolchain: 1.58.1
+        toolchain: 1.71.0
         default: true
         profile: minimal
         components: rustfmt, clippy
diff --git a/src/ecdsa.rs b/src/ecdsa.rs
index 52bb392..4589fcd 100644
--- a/src/ecdsa.rs
+++ b/src/ecdsa.rs
@@ -196,8 +196,8 @@ impl PublicKeyToJwk for EcdsaPrivateKey {
             kty: "EC".into(),
             use_: Some("sig".into()),
             crv: Some(self.algorithm.curve_name().into()),
-            x: Some(base64::encode_config(&x, url_safe_trailing_bits())),
-            y: Some(base64::encode_config(&y, url_safe_trailing_bits())),
+            x: Some(base64::encode_config(x, url_safe_trailing_bits())),
+            y: Some(base64::encode_config(y, url_safe_trailing_bits())),
             ..Default::default()
         })
     }
@@ -211,9 +211,9 @@ impl PrivateKeyToJwk for EcdsaPrivateKey {
             kty: "EC".into(),
             use_: Some("sig".into()),
             crv: Some(self.algorithm.curve_name().into()),
-            d: Some(base64::encode_config(&d, url_safe_trailing_bits())),
-            x: Some(base64::encode_config(&x, url_safe_trailing_bits())),
-            y: Some(base64::encode_config(&y, url_safe_trailing_bits())),
+            d: Some(base64::encode_config(d, url_safe_trailing_bits())),
+            x: Some(base64::encode_config(x, url_safe_trailing_bits())),
+            y: Some(base64::encode_config(y, url_safe_trailing_bits())),
             ..Default::default()
         })
     }
@@ -307,8 +307,8 @@ impl PublicKeyToJwk for EcdsaPublicKey {
             kty: "EC".into(),
             use_: Some("sig".into()),
             crv: Some(self.algorithm.curve_name().into()),
-            x: Some(base64::encode_config(&x, url_safe_trailing_bits())),
-            y: Some(base64::encode_config(&y, url_safe_trailing_bits())),
+            x: Some(base64::encode_config(x, url_safe_trailing_bits())),
+            y: Some(base64::encode_config(y, url_safe_trailing_bits())),
             ..Default::default()
         })
     }
diff --git a/src/eddsa.rs b/src/eddsa.rs
index 88f1be1..8b207d8 100644
--- a/src/eddsa.rs
+++ b/src/eddsa.rs
@@ -100,7 +100,7 @@ impl PublicKeyToJwk for Ed25519PrivateKey {
         Ok(Jwk {
             kty: "OKP".into(),
             crv: Some("Ed25519".into()),
-            x: Some(base64::encode_config(&bytes, url_safe_trailing_bits())),
+            x: Some(base64::encode_config(bytes, url_safe_trailing_bits())),
             ..Jwk::default()
         })
     }
@@ -113,8 +113,8 @@ impl PrivateKeyToJwk for Ed25519PrivateKey {
         Ok(Jwk {
             kty: "OKP".into(),
             crv: Some("Ed25519".into()),
-            d: Some(base64::encode_config(&d, url_safe_trailing_bits())),
-            x: Some(base64::encode_config(&x, url_safe_trailing_bits())),
+            d: Some(base64::encode_config(d, url_safe_trailing_bits())),
+            x: Some(base64::encode_config(x, url_safe_trailing_bits())),
             ..Jwk::default()
         })
     }
@@ -181,7 +181,7 @@ impl PublicKeyToJwk for Ed25519PublicKey {
         Ok(Jwk {
             kty: "OKP".into(),
             crv: Some("Ed25519".into()),
-            x: Some(base64::encode_config(&bytes, url_safe_trailing_bits())),
+            x: Some(base64::encode_config(bytes, url_safe_trailing_bits())),
             ..Jwk::default()
         })
     }
diff --git a/src/jwk.rs b/src/jwk.rs
index ee95311..dd1f285 100644
--- a/src/jwk.rs
+++ b/src/jwk.rs
@@ -350,8 +350,8 @@ impl JwkSetVerifier {
         } else if !self.require_kid {
             if let Some(res) = self
                 .keys
-                .iter()
-                .map(|(_, key)| verifier(token, key))
+                .values()
+                .map(|key| verifier(token, key))
                 .find_map(|res| res.ok())
             {
                 Ok(res)