diff --git a/Cargo.toml b/Cargo.toml
index d2931cd..7fe6a9a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,3 +8,8 @@ chrono = "0.4"
 clap = { version = "4.6", features = ["derive"] }
 rand = "0.10"
 roead = { version = "1.0", default-features = false, features = ["byml", "yaml"] }
+
+[lints.clippy]
+print_stdout = { level = "deny", priority = 1}
+pedantic = { level = "warn", priority = 0 }
+all = { level = "warn", priority = -1 }
diff --git a/src/exporter.rs b/src/exporter.rs
index e29b092..651db49 100644
--- a/src/exporter.rs
+++ b/src/exporter.rs
@@ -8,12 +8,12 @@ use roead::byml::Byml;
 */
 fn fix_yaml(byml: &Byml) -> Byml {
     match byml {
-        Byml::I32(v) => Byml::I64(*v as i64),
+        Byml::I32(v) => Byml::I64(i64::from(*v)),
         Byml::Array(arr) => Byml::Array(arr.iter().map(fix_yaml).collect()),
         Byml::Map(map) => {
             let mut new_map = roead::byml::Map::default();
             new_map.reserve(map.len());
-            for (k, v) in map.iter() {
+            for (k, v) in map {
                 new_map.insert(k.clone(), fix_yaml(v));
             }
             Byml::Map(new_map)
diff --git a/src/generator.rs b/src/generator.rs
index e8d02c1..f895149 100644
--- a/src/generator.rs
+++ b/src/generator.rs
@@ -40,7 +40,7 @@ pub fn generate(
         let regular = match override_opt.and_then(|o| o.regular.as_ref()) {
             Some(maps) => {
                 let mut sorted = maps.clone();
-                sorted.sort();
+                sorted.sort_unstable();
                 sorted
             }
             None => pick_maps(&mut rng, MAP_IDS, &prev_regular, &[]),
@@ -49,7 +49,7 @@ pub fn generate(
         let gachi = match override_opt.and_then(|o| o.ranked.as_ref()) {
             Some(maps) => {
                 let mut sorted = maps.clone();
-                sorted.sort();
+                sorted.sort_unstable();
                 sorted
             }
             None => pick_maps(&mut rng, MAP_IDS, &prev_gachi, &regular),
@@ -99,6 +99,6 @@ fn pick_maps<R: Rng>(rng: &mut R, pool: &[i32], prev: &[i32], exclude: &[i32]) -
     let mut shuffled = source;
     shuffled.shuffle(rng);
     let mut picked: Vec<i32> = shuffled.into_iter().take(2).collect();
-    picked.sort();
+    picked.sort_unstable();
     picked
 }
diff --git a/src/main.rs b/src/main.rs
index 81a073e..0873e5d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -14,6 +14,7 @@ use generator::RotationOverride;
 const DEFAULT: usize = 21 * 24 / 2;
 
 // If no start time is specified, use the last even hour
+#[must_use] 
 pub fn default_timestamp() -> i64 {
     let now = Utc::now().timestamp();
     let block = 2 * 60 * 60;
@@ -55,7 +56,7 @@ struct Args {
     #[arg(long)]
     yml: bool,
 
-    /// Set DisconnectByMemoryHash to true
+    /// Set `DisconnectByMemoryHash` to true
     #[arg(long)]
     hash_kick: bool,
 }
@@ -66,26 +67,22 @@ fn parse_map_ids(raw: &str, flag: &str) -> Vec<i32> {
     let parts: Vec<&str> = raw.split(',').collect();
     if parts.len() != 2 {
         eprintln!(
-            "error: {} requires exactly 2 comma-separated map IDs, got '{}'",
-            flag, raw
+            "error: {flag} requires exactly 2 comma-separated map IDs, got '{raw}'"
         );
         exit(1);
     }
     let mut ids: Vec<i32> = Vec::with_capacity(2);
     for p in &parts {
-        match p.trim().parse::<i32>() {
-            Ok(n) => ids.push(n),
-            Err(_) => {
-                eprintln!("error: {} contains invalid map ID '{}'", flag, p.trim());
-                exit(1);
-            }
+        if let Ok(n) = p.trim().parse::<i32>() { ids.push(n) } else {
+            eprintln!("error: {} contains invalid map ID '{}'", flag, p.trim());
+            exit(1);
         }
     }
     ids
 }
 
 fn split_eq_value(arg: &str, flag_name: &str) -> Option<String> {
-    let prefix = format!("{}=", flag_name);
+    let prefix = format!("{flag_name}=");
     if arg.starts_with(&prefix) {
         Some(arg[prefix.len()..].to_string())
     } else {
@@ -94,12 +91,9 @@ fn split_eq_value(arg: &str, flag_name: &str) -> Option<String> {
 }
 
 fn require_interval(current: Option<usize>) -> usize {
-    match current {
-        Some(n) => n,
-        None => {
-            eprintln!("error: --regular/--ranked/--rule must follow an --interval flag");
-            exit(1);
-        }
+    if let Some(n) = current { n } else {
+        eprintln!("error: --regular/--ranked/--rule must follow an --interval flag");
+        exit(1);
     }
 }
 
@@ -127,15 +121,11 @@ fn parse_overrides() -> (HashMap<usize, RotationOverride>, Vec<String>) {
                 }
                 raw[i].clone()
             };
-            match value.parse::<usize>() {
-                Ok(n) => current_interval = Some(n),
-                Err(_) => {
-                    eprintln!(
-                        "error: --interval value '{}' is not a valid positive integer",
-                        value
-                    );
-                    exit(1);
-                }
+            if let Ok(n) = value.parse::<usize>() { current_interval = Some(n) } else {
+                eprintln!(
+                    "error: --interval value '{value}' is not a valid positive integer"
+                );
+                exit(1);
             }
         } else if arg == "--regular" || split_eq_value(arg, "--regular").is_some() {
             let value = if let Some(v) = split_eq_value(arg, "--regular") {
@@ -179,8 +169,7 @@ fn parse_overrides() -> (HashMap<usize, RotationOverride>, Vec<String>) {
             let interval = require_interval(current_interval);
             if !VALID_RULES.contains(&value.as_str()) {
                 eprintln!(
-                    "error: --rule must be one of {:?}, got '{}'",
-                    VALID_RULES, value
+                    "error: --rule must be one of {VALID_RULES:?}, got '{value}'"
                 );
                 exit(1);
             }
@@ -231,5 +220,5 @@ fn derive_yml_path(output: &str) -> String {
         }
         return format!("{}.yml", stem.to_string_lossy());
     }
-    format!("{}.yml", output)
+    format!("{output}.yml")
 }