diff --git a/src/lib.rs b/src/lib.rs
index 0520dfb..d43488e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -31,7 +31,7 @@ use std::time::{SystemTime, UNIX_EPOCH};
 pub fn hex_encode<T: AsRef<[u8]>>(s: T) -> String {
     s.as_ref()
         .iter()
-        .map(|b| format!("{:02x}", b))
+        .map(|b| format!("{b:02x}"))
         .collect::<Vec<_>>()
         .join(":")
         .to_ascii_uppercase()
@@ -242,7 +242,7 @@ impl Certificate {
         }
     }
 
-    pub fn public_key_matches(&self, private_key: PrivateKey) -> bool {
+    pub fn public_key_matches(&self, private_key: &PrivateKey) -> bool {
         if self.key_modulo().to_string() == private_key.modulus.to_string() {
             return true;
         }
@@ -306,7 +306,7 @@ impl Chain {
             }
             x = match cert.public_key() {
                 Ok(public_key) => Some(public_key),
-                Err(_) => None,
+                Err(()) => None,
             }
         }
         !time_issue && !self.certs.is_empty()
diff --git a/ui/src/main.rs b/ui/src/main.rs
index e111082..c8e295f 100644
--- a/ui/src/main.rs
+++ b/ui/src/main.rs
@@ -415,7 +415,7 @@ impl Ui {
                         Ok(private_key) => {
                             if let Some(chain) = &self.chain {
                                 if let Some(first) = chain.certs().first() {
-                                    if first.public_key_matches(private_key) {
+                                    if first.public_key_matches(&private_key) {
                                         column![Container::new(text(
                                             "Private Key matches first Cert Public Key"
                                         ))
@@ -558,7 +558,7 @@ Authority-Key-Id:    {}
                     match PrivateKey::read(Path::new(&key)) {
                         Ok(private_key) => {
                             if let Some(cert) = chain.certs().first() {
-                                if cert.public_key_matches(private_key) {
+                                if cert.public_key_matches(&private_key) {
                                     output.push(
                                         "✓ Private Key matches first Cert Public Key".to_string(),
                                     );
@@ -679,7 +679,7 @@ Authority-Key-Id:    {}
                     match PrivateKey::read(Path::new(&key)) {
                         Ok(private_key) => {
                             if let Some(cert) = chain.certs().first() {
-                                return if cert.public_key_matches(private_key) && chain.is_valid() {
+                                return if cert.public_key_matches(&private_key) && chain.is_valid() {
                                     result
                                 } else {
                                     IndicatorState::Error