diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 382488af3a..12cef9e4a9 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -225,12 +225,12 @@ jobs:
       - uses: actions/checkout@v4
       - name: "Install nightly Rust toolchain"
         # Only pinned to make caching work, update freely
-        run: rustup toolchain install nightly-2023-06-08
+        run: rustup toolchain install nightly-2023-10-15
       - uses: Swatinem/rust-cache@v2
       - name: "Install cargo-udeps"
         uses: taiki-e/install-action@cargo-udeps
       - name: "Run cargo-udeps"
-        run: cargo +nightly-2023-06-08 udeps
+        run: cargo +nightly-2023-10-15 udeps
 
   python-package:
     name: "python package"
diff --git a/crates/flake8_to_ruff/src/parser.rs b/crates/flake8_to_ruff/src/parser.rs
index 468992ddf9..63ab9b6800 100644
--- a/crates/flake8_to_ruff/src/parser.rs
+++ b/crates/flake8_to_ruff/src/parser.rs
@@ -184,7 +184,7 @@ pub(crate) fn collect_per_file_ignores(
     for pair in pairs {
         per_file_ignores
             .entry(pair.pattern)
-            .or_insert_with(Vec::new)
+            .or_default()
             .push(pair.prefix);
     }
     per_file_ignores
diff --git a/crates/ruff_cli/src/args.rs b/crates/ruff_cli/src/args.rs
index 156ca6a616..8ac464d59d 100644
--- a/crates/ruff_cli/src/args.rs
+++ b/crates/ruff_cli/src/args.rs
@@ -711,7 +711,7 @@ pub fn collect_per_file_ignores(pairs: Vec<PatternPrefixPair>) -> Vec<PerFileIgn
     for pair in pairs {
         per_file_ignores
             .entry(pair.pattern)
-            .or_insert_with(Vec::new)
+            .or_default()
             .push(pair.prefix);
     }
     per_file_ignores
diff --git a/crates/ruff_formatter/src/builders.rs b/crates/ruff_formatter/src/builders.rs
index f5d81eb726..7eadba123a 100644
--- a/crates/ruff_formatter/src/builders.rs
+++ b/crates/ruff_formatter/src/builders.rs
@@ -2448,7 +2448,7 @@ where
 
     /// Adds a new entry to the join output.
     pub fn entry(&mut self, entry: &dyn Format<Context>) -> &mut Self {
-        self.result = self.result.and_then(|_| {
+        self.result = self.result.and_then(|()| {
             if let Some(with) = &self.with {
                 if self.has_elements {
                     with.fmt(self.fmt)?;
@@ -2519,7 +2519,7 @@ impl<'a, 'buf, Context> FillBuilder<'a, 'buf, Context> {
         separator: &dyn Format<Context>,
         entry: &dyn Format<Context>,
     ) -> &mut Self {
-        self.result = self.result.and_then(|_| {
+        self.result = self.result.and_then(|()| {
             if self.empty {
                 self.empty = false;
             } else {
diff --git a/crates/ruff_linter/src/rules/pycodestyle/rules/logical_lines/missing_whitespace_around_operator.rs b/crates/ruff_linter/src/rules/pycodestyle/rules/logical_lines/missing_whitespace_around_operator.rs
index c8ded09737..aac7247898 100644
--- a/crates/ruff_linter/src/rules/pycodestyle/rules/logical_lines/missing_whitespace_around_operator.rs
+++ b/crates/ruff_linter/src/rules/pycodestyle/rules/logical_lines/missing_whitespace_around_operator.rs
@@ -130,10 +130,7 @@ pub(crate) fn missing_whitespace_around_operator(
     context: &mut LogicalLinesContext,
 ) {
     let mut tokens = line.tokens().iter().peekable();
-    let first_token = tokens.by_ref().find_map(|token| {
-        let kind = token.kind();
-        (!kind.is_trivia()).then_some(token)
-    });
+    let first_token = tokens.by_ref().find(|token| !token.kind().is_trivia());
     let Some(mut prev_token) = first_token else {
         return;
     };
diff --git a/crates/ruff_notebook/src/notebook.rs b/crates/ruff_notebook/src/notebook.rs
index 34562473c4..611b90cbee 100644
--- a/crates/ruff_notebook/src/notebook.rs
+++ b/crates/ruff_notebook/src/notebook.rs
@@ -149,7 +149,7 @@ impl Notebook {
     {
         let trailing_newline = reader.seek(SeekFrom::End(-1)).is_ok_and(|_| {
             let mut buf = [0; 1];
-            reader.read_exact(&mut buf).is_ok_and(|_| buf[0] == b'\n')
+            reader.read_exact(&mut buf).is_ok_and(|()| buf[0] == b'\n')
         });
         reader.rewind()?;
         let mut raw_notebook: RawNotebook = match serde_json::from_reader(reader.by_ref()) {
diff --git a/crates/ruff_python_semantic/src/model.rs b/crates/ruff_python_semantic/src/model.rs
index 7ab3fed0d3..c9187aa39f 100644
--- a/crates/ruff_python_semantic/src/model.rs
+++ b/crates/ruff_python_semantic/src/model.rs
@@ -1159,7 +1159,7 @@ impl<'a> SemanticModel<'a> {
     pub fn add_delayed_annotation(&mut self, binding_id: BindingId, annotation_id: BindingId) {
         self.delayed_annotations
             .entry(binding_id)
-            .or_insert_with(Vec::new)
+            .or_default()
             .push(annotation_id);
     }
 
@@ -1173,7 +1173,7 @@ impl<'a> SemanticModel<'a> {
     pub fn add_rebinding_scope(&mut self, binding_id: BindingId, scope_id: ScopeId) {
         self.rebinding_scopes
             .entry(binding_id)
-            .or_insert_with(Vec::new)
+            .or_default()
             .push(scope_id);
     }
 
diff --git a/crates/ruff_workspace/src/options_base.rs b/crates/ruff_workspace/src/options_base.rs
index d13f5545db..60cbbe6fac 100644
--- a/crates/ruff_workspace/src/options_base.rs
+++ b/crates/ruff_workspace/src/options_base.rs
@@ -286,11 +286,11 @@ impl<'fmt, 'buf> DisplayVisitor<'fmt, 'buf> {
 
 impl Visit for DisplayVisitor<'_, '_> {
     fn record_set(&mut self, name: &str, _: OptionSet) {
-        self.result = self.result.and_then(|_| writeln!(self.f, "{name}"));
+        self.result = self.result.and_then(|()| writeln!(self.f, "{name}"));
     }
 
     fn record_field(&mut self, name: &str, field: OptionField) {
-        self.result = self.result.and_then(|_| {
+        self.result = self.result.and_then(|()| {
             write!(self.f, "{name}")?;
 
             if field.deprecated.is_some() {
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 7e8f0a9aab..50fa4928b9 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.72"
+channel = "1.73"