diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e7451a..f3db20e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -82,7 +82,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.65.0
+          toolchain: 1.71.0
           components: clippy
           override: true
       - run: sudo apt-get install libpcsclite-dev
diff --git a/cli/src/terminal.rs b/cli/src/terminal.rs
index ed836ad..f623162 100644
--- a/cli/src/terminal.rs
+++ b/cli/src/terminal.rs
@@ -182,7 +182,7 @@ pub fn print_cert_info(
     };
     let cert = &cert.cert;
 
-    let fingerprint = Sha256::digest(&cert.to_der().unwrap());
+    let fingerprint = Sha256::digest(cert.to_der().unwrap());
     let slot_id: u8 = slot.into();
     print_cert_attr(stream, "Slot", format!("{:x}", slot_id))?;
     print_cert_attr(
diff --git a/src/metadata.rs b/src/metadata.rs
index bd53ca1..b22b978 100644
--- a/src/metadata.rs
+++ b/src/metadata.rs
@@ -71,7 +71,7 @@ impl<T: MetadataType> Default for Metadata<T> {
     fn default() -> Self {
         Metadata {
             inner: Zeroizing::new(vec![]),
-            _marker: PhantomData::default(),
+            _marker: PhantomData,
         }
     }
 }
@@ -82,7 +82,7 @@ impl<T: MetadataType> Metadata<T> {
         let data = txn.fetch_object(T::obj_id())?;
         Ok(Metadata {
             inner: Tlv::parse_single(data, T::tag())?,
-            _marker: PhantomData::default(),
+            _marker: PhantomData,
         })
     }