diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index b17b8f8436..2b78fed2e9 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -13,5 +13,5 @@
 # limitations under the License.
 
 [toolchain]
-channel = "1.57.0"
+channel = "1.58.1"
 components = ["rustfmt", "clippy"]
diff --git a/src/config.rs b/src/config.rs
index 1ee8c00fba..37419868e6 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -470,7 +470,7 @@ dynamic:
         for config in configs {
             let result = Config::from_reader(config.as_bytes());
             let error = result.unwrap_err();
-            assert!(format!("{:?}", error).contains("unknown field"));
+            assert!(format!("{error:?}").contains("unknown field"));
         }
     }
 }
diff --git a/src/config/config_type.rs b/src/config/config_type.rs
index 252b708041..09788a9559 100644
--- a/src/config/config_type.rs
+++ b/src/config/config_type.rs
@@ -61,9 +61,7 @@ impl ConfigType<'_> {
                 .and_then(|raw_config| serde_yaml::from_str::<Static>(raw_config.as_str()))
                 .map_err(|err| {
                     Error::DeserializeFailed(format!(
-                        "filter `{}`: failed to YAML deserialize config: {}",
-                        filter_name,
-                        err.to_string()
+                        "filter `{filter_name}`: failed to YAML deserialize config: {err}",
                     ))
                 })
                 .and_then(|config| {
@@ -73,9 +71,7 @@ impl ConfigType<'_> {
             ConfigType::Dynamic(config) => prost::Message::decode(Bytes::from(config.value))
                 .map_err(|err| {
                     Error::DeserializeFailed(format!(
-                        "filter `{}`: config decode error: {}",
-                        filter_name,
-                        err.to_string()
+                        "filter `{filter_name}`: config decode error: {err}",
                     ))
                 })
                 .and_then(|config| Static::try_from(config).map_err(Error::ConvertProtoConfig))
@@ -93,9 +89,7 @@ impl ConfigType<'_> {
     {
         serde_json::to_value(config).map_err(|err| {
             Error::DeserializeFailed(format!(
-                "filter `{}`: failed to serialize config to json: {}",
-                filter_name,
-                err.to_string()
+                "filter `{filter_name}`: failed to serialize config to json: {err}",
             ))
         })
     }
diff --git a/src/endpoint.rs b/src/endpoint.rs
index 86cb9026a7..6284e680c6 100644
--- a/src/endpoint.rs
+++ b/src/endpoint.rs
@@ -339,8 +339,8 @@ impl<'a> Iterator for UpstreamEndpointsIter<'a> {
 mod tests {
     use super::*;
 
-    fn ep(id: usize) -> Endpoint {
-        Endpoint::new(format!("127.0.0.{}:8080", id).parse().unwrap())
+    fn ep(id: u8) -> Endpoint {
+        Endpoint::new(([127, 0, 0, id], 8080u16).into())
     }
 
     #[test]
@@ -392,7 +392,7 @@ mod tests {
 
         let mut up: UpstreamEndpoints = Endpoints::new(initial_endpoints.clone()).unwrap().into();
 
-        let items = up.retain(|ep| ep.address.to_string().as_str() != "127.0.0.2:8080");
+        let items = up.retain(|ep| ep.address != ([127, 0, 0, 2], 8080).into());
         assert!(matches!(items, RetainedItems::Some(3)));
         assert_eq!(up.size(), 3);
         assert_eq!(
@@ -400,7 +400,7 @@ mod tests {
             up.iter().cloned().collect::<Vec<_>>()
         );
 
-        let items = up.retain(|ep| ep.address.to_string().as_str() != "127.0.0.3:8080");
+        let items = up.retain(|ep| ep.address != ([127, 0, 0, 3], 8080).into());
         assert!(matches!(items, RetainedItems::Some(2)));
         assert_eq!(up.size(), 2);
         assert_eq!(vec![ep(1), ep(4)], up.iter().cloned().collect::<Vec<_>>());
diff --git a/src/filters/error.rs b/src/filters/error.rs
index c8e3571e86..f8d47648da 100644
--- a/src/filters/error.rs
+++ b/src/filters/error.rs
@@ -55,7 +55,7 @@ impl From<MetricsError> for Error {
 #[derive(Debug, PartialEq, thiserror::Error)]
 #[error(
     "{}failed to convert protobuf config: {}",
-    self.field.as_ref().map(|f| format!("Field `{}` ", f)).unwrap_or_default(),
+    self.field.as_ref().map(|f| format!("Field `{f}`")).unwrap_or_default(),
     reason
 )]
 pub struct ConvertProtoConfigError {
@@ -92,7 +92,7 @@ macro_rules! enum_no_match_error {
                 $( (stringify!($allowed_value), <$enum_type>::$allowed_value as i32) ),+
               ]
               .into_iter()
-              .map(|(a, b)| format!("{} => {}", a, b as i32))
+              .map(|(a, b)| format!("{a} => {}", b as i32))
               .collect::<Vec<_>>()
               .join(", ")
             ),
diff --git a/src/filters/firewall/config.rs b/src/filters/firewall/config.rs
index b40f3d03d8..8e5776588d 100644
--- a/src/filters/firewall/config.rs
+++ b/src/filters/firewall/config.rs
@@ -183,21 +183,20 @@ impl TryFrom<ProtoConfig> for Config {
         fn convert_port(range: &ProtoPortRange) -> Result<PortRange, ConvertProtoConfigError> {
             let min = u16::try_from(range.min).map_err(|err| {
                 ConvertProtoConfigError::new(
-                    format!("min too large: {}", err),
+                    format!("min too large: {err}"),
                     Some("port.min".into()),
                 )
             })?;
 
             let max = u16::try_from(range.max).map_err(|err| {
                 ConvertProtoConfigError::new(
-                    format!("max too large: {}", err),
+                    format!("max too large: {err}"),
                     Some("port.max".into()),
                 )
             })?;
 
-            PortRange::new(min, max).map_err(|err| {
-                ConvertProtoConfigError::new(format!("{}", err), Some("ports".into()))
-            })
+            PortRange::new(min, max)
+                .map_err(|err| ConvertProtoConfigError::new(format!("{err}"), Some("ports".into())))
         }
 
         fn convert_rule(rule: &ProtoRule) -> Result<Rule, ConvertProtoConfigError> {
@@ -211,7 +210,7 @@ impl TryFrom<ProtoConfig> for Config {
 
             let source = IpNetwork::try_from(rule.source.as_str()).map_err(|err| {
                 ConvertProtoConfigError::new(
-                    format!("invalid source: {:?}", err),
+                    format!("invalid source: {err:?}"),
                     Some("source".into()),
                 )
             })?;
diff --git a/src/filters/load_balancer.rs b/src/filters/load_balancer.rs
index 5272ffa36d..dc981c9911 100644
--- a/src/filters/load_balancer.rs
+++ b/src/filters/load_balancer.rs
@@ -66,7 +66,7 @@ impl FilterFactory for LoadBalancerFilterFactory {
 
 #[cfg(test)]
 mod tests {
-    use std::collections::HashSet;
+    use std::{collections::HashSet, net::Ipv4Addr};
 
     use crate::{
         endpoint::{Endpoint, EndpointAddress, Endpoints},
@@ -190,12 +190,12 @@ policy: RANDOM
     #[test]
     fn hash_load_balancer_policy() {
         let addresses: Vec<EndpointAddress> = vec![
-            "127.0.0.1:8080".parse().unwrap(),
-            "127.0.0.2:8080".parse().unwrap(),
-            "127.0.0.3:8080".parse().unwrap(),
+            ([127, 0, 0, 1], 8080).into(),
+            ([127, 0, 0, 2], 8080).into(),
+            ([127, 0, 0, 3], 8080).into(),
         ];
-        let source_ips = vec!["127.1.1.1", "127.2.2.2", "127.3.3.3"];
-        let source_ports = vec!["11111", "22222", "33333", "44444", "55555"];
+        let source_ips = vec![[127u8, 1, 1, 1], [127, 2, 2, 2], [127, 3, 3, 3]];
+        let source_ports = vec![11111u16, 22222, 33333, 44444, 55555];
 
         let yaml = "
 policy: HASH
@@ -210,7 +210,7 @@ policy: HASH
                     get_response_addresses(
                         filter.as_ref(),
                         &addresses,
-                        "127.0.0.1:8080".parse().unwrap(),
+                        (Ipv4Addr::LOCALHOST, 8080).into(),
                     )
                 })
                 .collect::<Vec<_>>();
@@ -231,13 +231,13 @@ policy: HASH
         // Run a few selection rounds through the address
         // this time vary the port for a single IP
         let mut result_sequences = vec![];
-        for port in &source_ports {
+        for port in source_ports.iter().copied() {
             let sequence = (0..addresses.len())
                 .map(|_| {
                     get_response_addresses(
                         filter.as_ref(),
                         &addresses,
-                        format!("127.0.0.1:{}", port).parse().unwrap(),
+                        (Ipv4Addr::LOCALHOST, port).into(),
                     )
                 })
                 .collect::<Vec<_>>();
@@ -259,15 +259,9 @@ policy: HASH
         // This time vary the source IP and port
         let mut result_sequences = vec![];
         for ip in source_ips {
-            for port in &source_ports {
+            for port in source_ports.iter().copied() {
                 let sequence = (0..addresses.len())
-                    .map(|_| {
-                        get_response_addresses(
-                            filter.as_ref(),
-                            &addresses,
-                            format!("{}:{}", ip, port).parse().unwrap(),
-                        )
-                    })
+                    .map(|_| get_response_addresses(filter.as_ref(), &addresses, (ip, port).into()))
                     .collect::<Vec<_>>();
                 result_sequences.push(sequence);
             }
@@ -291,7 +285,5 @@ policy: HASH
                 .any(|seq| seq != &result_sequences[0]),
             "the same sequence of addresses were chosen for hash load balancer"
         );
-
-        //
     }
 }
diff --git a/src/filters/local_rate_limit.rs b/src/filters/local_rate_limit.rs
index 9024a66838..cbcc3c6a0f 100644
--- a/src/filters/local_rate_limit.rs
+++ b/src/filters/local_rate_limit.rs
@@ -281,7 +281,7 @@ period: 0
             })
             .err()
             .unwrap();
-        assert!(format!("{:?}", err).contains("value must be at least 1 second"));
+        assert!(format!("{err:?}").contains("value must be at least 1 second"));
     }
 
     #[test]
diff --git a/src/filters/token_router.rs b/src/filters/token_router.rs
index f810e1305d..ad52972bc7 100644
--- a/src/filters/token_router.rs
+++ b/src/filters/token_router.rs
@@ -81,8 +81,7 @@ impl FilterFactory for TokenRouterFactory {
                 serde_json::to_value(&config)
                     .map_err(|err| {
                         Error::DeserializeFailed(format!(
-                            "failed to JSON deserialize default config: {}",
-                            err
+                            "failed to JSON deserialize default config: {err}",
                         ))
                     })
                     .map(|config_json| (config_json, config))
diff --git a/src/main.rs b/src/main.rs
index 56ec295afe..301d58e8b7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -25,7 +25,7 @@ async fn main() -> quilkin::Result<()> {
     tracing_subscriber::fmt().json().with_target(false).init();
     stable_eyre::install()?;
     let version: std::borrow::Cow<'static, str> = if cfg!(debug_assertions) {
-        format!("{}+debug", VERSION).into()
+        format!("{VERSION}+debug").into()
     } else {
         VERSION.into()
     };
diff --git a/src/metrics.rs b/src/metrics.rs
index 61f8ca1db6..083259802d 100644
--- a/src/metrics.rs
+++ b/src/metrics.rs
@@ -49,7 +49,7 @@ pub fn histogram_opts(
 
 /// Create a generic metrics options for a filter.
 pub fn filter_opts(name: &str, filter_name: &str, description: &str) -> Opts {
-    opts(name, &format!("filter_{}", filter_name), description)
+    opts(name, &format!("filter_{filter_name}"), description)
 }
 
 /// Registers the current metric collector with the provided registry.
diff --git a/src/proxy/builder.rs b/src/proxy/builder.rs
index bd2f83967d..8a11235e2f 100644
--- a/src/proxy/builder.rs
+++ b/src/proxy/builder.rs
@@ -269,7 +269,7 @@ mod tests {
             .validate()
         {
             Err(Error::InvalidConfig(err)) => err,
-            Err(err) => unreachable!(format!("expected ValidationError, got {}", err)),
+            Err(err) => unreachable!(format!("expected ValidationError, got {err}")),
             Ok(_) => unreachable!("config validation should have failed!"),
         }
     }
diff --git a/src/proxy/config_dump.rs b/src/proxy/config_dump.rs
index bafa6ac784..fb3fd2fc37 100644
--- a/src/proxy/config_dump.rs
+++ b/src/proxy/config_dump.rs
@@ -61,7 +61,7 @@ pub(crate) fn handle_request(
         }
         Err(err) => {
             *response.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
-            *response.body_mut() = Body::from(format!("failed to create config dump: {}", err));
+            *response.body_mut() = Body::from(format!("failed to create config dump: {err}"));
         }
     }
 
diff --git a/src/proxy/server/resource_manager.rs b/src/proxy/server/resource_manager.rs
index 89c971c726..764f4a8f2f 100644
--- a/src/proxy/server/resource_manager.rs
+++ b/src/proxy/server/resource_manager.rs
@@ -49,7 +49,7 @@ impl StaticResourceManagers {
     ) -> Result<StaticResourceManagers, InitializeError> {
         Ok(Self {
             cluster_manager: ClusterManager::fixed(metrics_registry, endpoints)
-                .map_err(|err| InitializeError::Message(format!("{:?}", err)))?,
+                .map_err(|err| InitializeError::Message(format!("{err:?}")))?,
             filter_manager: FilterManager::fixed(filter_chain),
         })
     }
@@ -97,11 +97,11 @@ impl DynamicResourceManagers {
 
         let cluster_manager =
             ClusterManager::dynamic(&metrics_registry, cluster_updates_rx, shutdown_rx.clone())
-                .map_err(|err| InitializeError::Message(format!("{:?}", err)))?;
+                .map_err(|err| InitializeError::Message(format!("{err:?}")))?;
 
         let filter_manager =
             FilterManager::dynamic(&metrics_registry, filter_chain_updates_rx, shutdown_rx)
-                .map_err(|err| InitializeError::Message(format!("{:?}", err)))?;
+                .map_err(|err| InitializeError::Message(format!("{err:?}")))?;
 
         Ok(Self {
             cluster_manager,
@@ -125,7 +125,7 @@ impl DynamicResourceManagers {
         } = args;
 
         let client = AdsClient::new(&metrics_registry).map_err(|err| {
-            InitializeError::Message(format!("failed to initialize xDS client: {:?}", err))
+            InitializeError::Message(format!("failed to initialize xDS client: {err:?}"))
         })?;
         tokio::spawn(async move {
             let result = client
diff --git a/src/test_utils.rs b/src/test_utils.rs
index 1c0697a815..a85333908a 100644
--- a/src/test_utils.rs
+++ b/src/test_utils.rs
@@ -301,7 +301,7 @@ pub fn config_with_dummy_endpoint() -> ConfigBuilder {
 /// Creates a dummy endpoint with `id` as a suffix.
 pub fn ep(id: u8) -> Endpoint {
     Endpoint {
-        address: format!("127.0.0.{}:8080", id).parse().unwrap(),
+        address: ([127, 0, 0, id], 8080).into(),
         ..<_>::default()
     }
 }
diff --git a/src/xds/ads_client.rs b/src/xds/ads_client.rs
index c26901203d..3b9e298cda 100644
--- a/src/xds/ads_client.rs
+++ b/src/xds/ads_client.rs
@@ -129,7 +129,7 @@ impl AdsClient {
 
                     // Do not retry if this is an invalid URL error that we cannot recover from.
                     // Need to use {:?} as the Display output only returns 'transport error'
-                    let err_description = format!("{:?}", error);
+                    let err_description = format!("{error:?}");
                     if err_description.to_lowercase().contains("invalid url") {
                         RetryPolicy::Break
                     } else {
diff --git a/src/xds/cluster.rs b/src/xds/cluster.rs
index 2f89ea475a..9a0fb54c74 100644
--- a/src/xds/cluster.rs
+++ b/src/xds/cluster.rs
@@ -371,7 +371,6 @@ mod tests {
     use prost_types::Struct as ProstStruct;
     use prost_types::Value as ProstValue;
     use std::collections::{HashMap, HashSet};
-    use std::net::SocketAddr;
     use tokio::sync::mpsc;
 
     type ClusterState = HashMap<String, ProxyCluster>;
@@ -433,17 +432,15 @@ mod tests {
 
         let _ = recv_cluster_and_endpoint_reqs(&mut discovery_req_rx).await;
 
-        let mut version = 4;
-        let mut nonce = 9;
+        let mut version = 4u8;
+        let mut nonce = 9u8;
         for _ in 0..3 {
             let v = &version.to_string();
             let n = &nonce.to_string();
 
-            let new_address = format!("127.0.0.{}", nonce);
-            let new_port = 2020 + nonce;
-            let expected_socket_addr = format!("{}:{}", new_address, new_port)
-                .parse::<SocketAddr>()
-                .unwrap();
+            let new_address = std::net::Ipv4Addr::from([127, 0, 0, nonce]);
+            let new_port = 2020 + nonce as u16;
+            let expected_socket_addr = (new_address, new_port);
             cm.on_cluster_load_assignment_response(endpoint_discovery_response_with_update(
                 v,
                 n,
@@ -455,10 +452,12 @@ mod tests {
                                 address: Some(Address {
                                     address: Some(address::Address::SocketAddress(SocketAddress {
                                         protocol: 1,
-                                        address: new_address.clone(),
+                                        address: new_address.to_string(),
                                         resolver_name: "".into(),
                                         ipv4_compat: true,
-                                        port_specifier: Some(PortSpecifier::PortValue(new_port)),
+                                        port_specifier: Some(PortSpecifier::PortValue(
+                                            new_port as u32,
+                                        )),
                                     })),
                                 }),
                                 health_check_config: None,
@@ -794,7 +793,7 @@ mod tests {
         assert_eq!(dyn_metadata.len(), 1);
 
         let value = dyn_metadata
-            .get(&format!("key-{}", cluster_name).into())
+            .get(&format!("key-{cluster_name}").into())
             .unwrap();
         assert_eq!(
             value,
diff --git a/src/xds/listener.rs b/src/xds/listener.rs
index 0bbafb2653..8819ae694c 100644
--- a/src/xds/listener.rs
+++ b/src/xds/listener.rs
@@ -411,7 +411,7 @@ mod tests {
         for (i, (filter, expected_payload)) in test_cases.into_iter().enumerate() {
             // Send a response with a filter chain.
             let lds_listener = create_lds_listener(
-                format!("test-listener-{}", i),
+                format!("test-listener-{i}"),
                 vec![create_lds_filter_chain(filter)],
             );
             let mut buf = vec![];
@@ -421,7 +421,7 @@ mod tests {
                 value: buf,
             };
 
-            let (version_info, nonce) = (format!("version-{}", i), format!("nonce-{}", i));
+            let (version_info, nonce) = (format!("version-{i}"), format!("nonce-{i}"));
             // Send the proto message as a DiscoveryResponse to the manager.
             manager
                 .on_listener_response(DiscoveryResponse {
diff --git a/tests/compress.rs b/tests/compress.rs
index fdcb77e3bc..e39c22c245 100644
--- a/tests/compress.rs
+++ b/tests/compress.rs
@@ -14,7 +14,7 @@
  *  limitations under the License.
  */
 
-use std::net::SocketAddr;
+use std::net::{Ipv4Addr, SocketAddr};
 
 use tokio::time::{timeout, Duration};
 
@@ -62,9 +62,7 @@ on_write: DECOMPRESS
                 name: compress::factory().name().into(),
                 config: serde_yaml::from_str(yaml).unwrap(),
             }],
-            vec![Endpoint::new(
-                format!("127.0.0.1:{}", server_port).parse().unwrap(),
-            )],
+            vec![Endpoint::new((Ipv4Addr::LOCALHOST, server_port).into())],
         )
         .build();
     // Run client proxy.
@@ -74,7 +72,7 @@ on_write: DECOMPRESS
     let (mut rx, tx) = t.open_socket_and_recv_multiple_packets().await;
 
     // game_client
-    let local_addr: SocketAddr = format!("127.0.0.1:{}", client_port).parse().unwrap();
+    let local_addr = SocketAddr::from((Ipv4Addr::LOCALHOST, client_port));
     tracing::info!(address = %local_addr, "Sending hello");
     tx.send_to(b"hello", &local_addr).await.unwrap();
 
diff --git a/tests/filter_order.rs b/tests/filter_order.rs
index 53adb2b3eb..7eee3ea0db 100644
--- a/tests/filter_order.rs
+++ b/tests/filter_order.rs
@@ -15,7 +15,7 @@
  */
 
 ///! Complex integration tests that incorporate multiple elements
-use std::{net::SocketAddr, str::from_utf8};
+use std::{net::Ipv4Addr, str::from_utf8};
 
 use tokio::time::{timeout, Duration};
 
@@ -81,7 +81,7 @@ on_write: DECOMPRESS
     // let's send the packet
     let (mut recv_chan, socket) = t.open_socket_and_recv_multiple_packets().await;
 
-    let local_addr: SocketAddr = format!("127.0.0.1:{}", server_port).parse().unwrap();
+    let local_addr = (Ipv4Addr::LOCALHOST, server_port);
     socket.send_to(b"hello", &local_addr).await.unwrap();
 
     assert_eq!(
diff --git a/tests/xds.rs b/tests/xds.rs
index 87d0866774..2ce950762b 100644
--- a/tests/xds.rs
+++ b/tests/xds.rs
@@ -282,7 +282,7 @@ dynamic:
         // Open a socket we can use to talk to the proxy and receive response back on.
         let (mut response_rx, socket) = t.open_socket_and_recv_multiple_packets().await;
 
-        let expected_response = format!("a{}{}", b1, b2);
+        let expected_response = format!("a{b1}{b2}");
         let mut interval = time::interval(Duration::from_millis(10));
         loop {
             // Send a packet, it should be suffixed with the new filter configs.