diff --git a/Cargo.lock b/Cargo.lock
index c76cb5f89..320902015 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4470,7 +4470,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c1318b19085f08681016926435853bbf7858f9c082d0999b80550ff5d9abe15"
 dependencies = [
  "bytes",
- "heck 0.5.0",
+ "heck 0.4.1",
  "itertools 0.13.0",
  "log",
  "multimap",
@@ -4573,9 +4573,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3"
-version = "0.22.5"
+version = "0.23.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d922163ba1f79c04bc49073ba7b32fd5a8d3b76a87c955921234b8e77333c51"
+checksum = "57fe09249128b3173d092de9523eaa75136bf7ba85e0d69eca241c7939c933cc"
 dependencies = [
  "cfg-if",
  "indoc",
@@ -4591,9 +4591,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.22.5"
+version = "0.23.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc38c5feeb496c8321091edf3d63e9a6829eab4b863b4a6a65f26f3e9cc6b179"
+checksum = "1cd3927b5a78757a0d71aa9dff669f903b1eb64b54142a9bd9f757f8fde65fd7"
 dependencies = [
  "once_cell",
  "target-lexicon",
@@ -4601,9 +4601,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.22.5"
+version = "0.23.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94845622d88ae274d2729fcefc850e63d7a3ddff5e3ce11bd88486db9f1d357d"
+checksum = "dab6bb2102bd8f991e7749f130a70d05dd557613e39ed2deeee8e9ca0c4d548d"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -4611,9 +4611,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.22.5"
+version = "0.23.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e655aad15e09b94ffdb3ce3d217acf652e26bbc37697ef012f5e5e348c716e5e"
+checksum = "91871864b353fd5ffcb3f91f2f703a22a9797c91b9ab497b1acac7b07ae509c7"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -4623,9 +4623,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.22.5"
+version = "0.23.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae1e3f09eecd94618f60a455a23def79f79eba4dc561a97324bf9ac8c6df30ce"
+checksum = "43abc3b80bc20f3facd86cd3c60beed58c3e2aa26213f3cda368de39c60a27e4"
 dependencies = [
  "heck 0.5.0",
  "proc-macro2",
@@ -5592,7 +5592,7 @@ version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "03c3c6b7927ffe7ecaa769ee0e3994da3b8cafc8f444578982c83ecb161af917"
 dependencies = [
- "heck 0.5.0",
+ "heck 0.4.1",
  "proc-macro2",
  "quote",
  "syn 2.0.82",
diff --git a/Cargo.toml b/Cargo.toml
index c8ebd2da5..254d08f3a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -110,7 +110,7 @@ prost-build = "0.13"
 prost-reflect = "0.14"
 prost-types = "0.13"
 pulldown-cmark = "0.9.6"
-pyo3 = { version = "0.22.5", features = ["extension-module", "abi3", "abi3-py39"] }
+pyo3 = { version = "0.23.4", features = ["extension-module", "abi3", "abi3-py39"] }
 rand = "0.8.5"
 regex = "1.11.0"
 reqwest = { version = "0.12.8", default-features = false, features = ["json", "socks", "stream", "multipart"] }
diff --git a/pylib/rsbridge/lib.rs b/pylib/rsbridge/lib.rs
index b653dd0ba..a7b410834 100644
--- a/pylib/rsbridge/lib.rs
+++ b/pylib/rsbridge/lib.rs
@@ -56,7 +56,7 @@ impl Backend {
         let in_bytes = input.as_bytes();
         py.allow_threads(|| self.backend.run_service_method(service, method, in_bytes))
             .map(|out_bytes| {
-                let out_obj = PyBytes::new_bound(py, &out_bytes);
+                let out_obj = PyBytes::new(py, &out_bytes);
                 out_obj.into()
             })
             .map_err(BackendError::new_err)
@@ -72,7 +72,7 @@ impl Backend {
                 .map_err(BackendError::new_err)
         });
         let out_bytes = out_res?;
-        let out_obj = PyBytes::new_bound(py, &out_bytes);
+        let out_obj = PyBytes::new(py, &out_bytes);
         Ok(out_obj.into())
     }
 }
diff --git a/rslib/src/backend/mod.rs b/rslib/src/backend/mod.rs
index 42260b150..d15652675 100644
--- a/rslib/src/backend/mod.rs
+++ b/rslib/src/backend/mod.rs
@@ -175,9 +175,9 @@ impl Backend {
         // currently limited to http1, as nginx doesn't support http2 proxies
         let mut web_client = self.web_client.lock().unwrap();
 
-        return web_client
+        web_client
             .get_or_insert_with(|| Client::builder().http1_only().build().unwrap())
-            .clone();
+            .clone()
     }
 
     fn db_command(&self, input: &[u8]) -> Result<Vec<u8>> {
diff --git a/rslib/src/backend/sync.rs b/rslib/src/backend/sync.rs
index 90f40ad6c..03cf12686 100644
--- a/rslib/src/backend/sync.rs
+++ b/rslib/src/backend/sync.rs
@@ -168,6 +168,7 @@ impl crate::services::BackendSyncService for Backend {
 
 impl Backend {
     /// Return a handle for regular (non-media) syncing.
+    #[allow(clippy::type_complexity)]
     fn sync_abort_handle(
         &self,
     ) -> Result<(
diff --git a/rslib/src/card_rendering/parser.rs b/rslib/src/card_rendering/parser.rs
index ca1d17eb5..e57f686d2 100644
--- a/rslib/src/card_rendering/parser.rs
+++ b/rslib/src/card_rendering/parser.rs
@@ -83,9 +83,9 @@ impl<'a> Directive<'a> {
 }
 
 /// Consume 0 or more of anything in " \t\r\n" after `parser`.
-fn trailing_whitespace0<'parser, 's, P, O>(parser: P) -> impl FnMut(&'s str) -> IResult<O>
+fn trailing_whitespace0<'parser, 's, P, O>(parser: P) -> impl FnMut(&'s str) -> IResult<'s, O>
 where
-    P: FnMut(&'s str) -> IResult<O> + 'parser,
+    P: FnMut(&'s str) -> IResult<'s, O> + 'parser,
 {
     terminated(parser, multispace0)
 }
@@ -93,7 +93,7 @@ where
 /// Parse until char in `arr` is found. Always succeeds.
 fn is_not0<'parser, 'arr: 'parser, 's: 'parser>(
     arr: &'arr str,
-) -> impl FnMut(&'s str) -> IResult<&'s str> + 'parser {
+) -> impl FnMut(&'s str) -> IResult<'s, &'s str> + 'parser {
     alt((is_not(arr), success("")))
 }
 
@@ -120,7 +120,7 @@ fn tag_node(s: &str) -> IResult<Node> {
     /// Return a parser to match an opening `name` tag and return its options.
     fn opening_parser<'name, 's: 'name>(
         name: &'name str,
-    ) -> impl FnMut(&'s str) -> IResult<Vec<(&str, &str)>> + 'name {
+    ) -> impl FnMut(&'s str) -> IResult<'s, Vec<(&'s str, &'s str)>> + 'name {
         /// List of whitespace-separated `key=val` tuples, where `val` may be
         /// empty.
         fn options(s: &str) -> IResult<Vec<(&str, &str)>> {
@@ -148,7 +148,7 @@ fn tag_node(s: &str) -> IResult<Node> {
     /// Return a parser to match a closing `name` tag.
     fn closing_parser<'parser, 'name: 'parser, 's: 'parser>(
         name: &'name str,
-    ) -> impl FnMut(&'s str) -> IResult<()> + 'parser {
+    ) -> impl FnMut(&'s str) -> IResult<'s, ()> + 'parser {
         value((), tuple((tag("[/anki:"), tag(name), tag("]"))))
     }
 
@@ -156,7 +156,7 @@ fn tag_node(s: &str) -> IResult<Node> {
     /// is found.
     fn content_parser<'parser, 'name: 'parser, 's: 'parser>(
         name: &'name str,
-    ) -> impl FnMut(&'s str) -> IResult<&str> + 'parser {
+    ) -> impl FnMut(&'s str) -> IResult<'s, &'s str> + 'parser {
         recognize(many0(pair(not(closing_parser(name)), anychar)))
     }
 
diff --git a/rslib/src/card_rendering/writer.rs b/rslib/src/card_rendering/writer.rs
index 594d25fd5..892cb9087 100644
--- a/rslib/src/card_rendering/writer.rs
+++ b/rslib/src/card_rendering/writer.rs
@@ -12,7 +12,7 @@ use crate::prelude::*;
 use crate::text::decode_entities;
 use crate::text::strip_html_for_tts;
 
-impl<'a> CardNodes<'a> {
+impl CardNodes<'_> {
     pub(super) fn write_without_av_tags(&self) -> String {
         AvStripper::new().write(self)
     }
diff --git a/rslib/src/import_export/package/media.rs b/rslib/src/import_export/package/media.rs
index fb50a2b4e..6b0b4c370 100644
--- a/rslib/src/import_export/package/media.rs
+++ b/rslib/src/import_export/package/media.rs
@@ -108,11 +108,11 @@ impl SafeMediaEntry {
         get_checksum: &mut impl FnMut(&str) -> Result<Option<Sha1Hash>>,
     ) -> Result<bool> {
         get_checksum(&self.name)
-            .map(|opt| opt.map_or(false, |sha1| sha1 == self.sha1.expect("sha1 not set")))
+            .map(|opt| opt.is_some_and(|sha1| sha1 == self.sha1.expect("sha1 not set")))
     }
 
     pub(super) fn has_size_equal_to(&self, other_path: &Path) -> bool {
-        fs::metadata(other_path).map_or(false, |metadata| metadata.len() == self.size as u64)
+        fs::metadata(other_path).is_ok_and(|metadata| metadata.len() == self.size as u64)
     }
 
     /// Copy the archived file to the target folder, setting its hash if
diff --git a/rslib/src/import_export/text/csv/import.rs b/rslib/src/import_export/text/csv/import.rs
index a74ded8c3..f8422f6bd 100644
--- a/rslib/src/import_export/text/csv/import.rs
+++ b/rslib/src/import_export/text/csv/import.rs
@@ -211,7 +211,7 @@ fn remove_tags_line_from_reader(reader: &mut (impl Read + Seek)) -> Result<()> {
     let mut first_line = String::new();
     buf_reader.read_line(&mut first_line)?;
     let offset = if strip_utf8_bom(&first_line).starts_with("tags:") {
-        first_line.as_bytes().len()
+        first_line.len()
     } else {
         0
     };
diff --git a/rslib/src/import_export/text/import.rs b/rslib/src/import_export/text/import.rs
index c16c7ceb4..f28c27ca3 100644
--- a/rslib/src/import_export/text/import.rs
+++ b/rslib/src/import_export/text/import.rs
@@ -492,7 +492,7 @@ impl NoteContext<'_> {
     fn is_guid_dupe(&self) -> bool {
         self.dupes
             .first()
-            .map_or(false, |d| d.note.guid == self.note.guid)
+            .is_some_and(|d| d.note.guid == self.note.guid)
     }
 
     fn has_first_field(&self) -> bool {
diff --git a/rslib/src/notetype/checks.rs b/rslib/src/notetype/checks.rs
index fd3f20d09..3112168d5 100644
--- a/rslib/src/notetype/checks.rs
+++ b/rslib/src/notetype/checks.rs
@@ -66,7 +66,7 @@ fn references_media_field(format: &str) -> bool {
 fn captures_contain_field_replacement(caps: Captures) -> bool {
     caps.iter()
         .skip(1)
-        .any(|opt| opt.map_or(false, match_contains_field_replacement))
+        .any(|opt| opt.is_some_and(match_contains_field_replacement))
 }
 
 fn match_contains_field_replacement(m: Match) -> bool {
diff --git a/rslib/src/notetype/mod.rs b/rslib/src/notetype/mod.rs
index fc713c798..914170bc4 100644
--- a/rslib/src/notetype/mod.rs
+++ b/rslib/src/notetype/mod.rs
@@ -699,7 +699,7 @@ fn missing_cloze_filter(
 fn has_cloze(template: &Option<ParsedTemplate>) -> bool {
     template
         .as_ref()
-        .map_or(false, |t| !t.all_referenced_cloze_field_names().is_empty())
+        .is_some_and(|t| !t.all_referenced_cloze_field_names().is_empty())
 }
 
 impl From<Notetype> for NotetypeProto {
diff --git a/rslib/src/scheduler/states/fuzz.rs b/rslib/src/scheduler/states/fuzz.rs
index 5c7e90809..cafec2f2a 100644
--- a/rslib/src/scheduler/states/fuzz.rs
+++ b/rslib/src/scheduler/states/fuzz.rs
@@ -31,7 +31,7 @@ static FUZZ_RANGES: [FuzzRange; 3] = [
     },
 ];
 
-impl<'a> StateContext<'a> {
+impl StateContext<'_> {
     /// Apply fuzz, respecting the passed bounds.
     pub(crate) fn with_review_fuzz(&self, interval: f32, minimum: u32, maximum: u32) -> u32 {
         self.load_balancer
diff --git a/rslib/src/scheduler/states/load_balancer.rs b/rslib/src/scheduler/states/load_balancer.rs
index 77c34dae6..678dd9169 100644
--- a/rslib/src/scheduler/states/load_balancer.rs
+++ b/rslib/src/scheduler/states/load_balancer.rs
@@ -90,7 +90,7 @@ pub struct LoadBalancerContext<'a> {
     fuzz_seed: Option<u64>,
 }
 
-impl<'a> LoadBalancerContext<'a> {
+impl LoadBalancerContext<'_> {
     pub fn find_interval(&self, interval: f32, minimum: u32, maximum: u32) -> Option<u32> {
         self.load_balancer.find_interval(
             interval,
diff --git a/rslib/src/scheduler/states/mod.rs b/rslib/src/scheduler/states/mod.rs
index 527298a87..f73d2393b 100644
--- a/rslib/src/scheduler/states/mod.rs
+++ b/rslib/src/scheduler/states/mod.rs
@@ -114,7 +114,7 @@ pub(crate) struct StateContext<'a> {
     pub preview_delays: PreviewDelays,
 }
 
-impl<'a> StateContext<'a> {
+impl StateContext<'_> {
     /// Return the minimum and maximum review intervals.
     /// - `maximum` is `self.maximum_review_interval`, but at least 1.
     /// - `minimum` is as passed, but at least 1, and at most `maximum`.
diff --git a/rslib/src/scheduler/states/steps.rs b/rslib/src/scheduler/states/steps.rs
index 6c62bd0d1..5cb11f930 100644
--- a/rslib/src/scheduler/states/steps.rs
+++ b/rslib/src/scheduler/states/steps.rs
@@ -13,7 +13,7 @@ fn to_secs(v: f32) -> u32 {
     (v * 60.0) as u32
 }
 
-impl<'a> LearningSteps<'a> {
+impl LearningSteps<'_> {
     /// Takes `steps` as minutes.
     pub(crate) fn new(steps: &[f32]) -> LearningSteps<'_> {
         LearningSteps { steps }
diff --git a/rslib/src/storage/card/data.rs b/rslib/src/storage/card/data.rs
index ea529c495..8ef94146f 100644
--- a/rslib/src/storage/card/data.rs
+++ b/rslib/src/storage/card/data.rs
@@ -121,7 +121,7 @@ fn validate_custom_data(json_str: &str) -> Result<()> {
         let object: HashMap<&str, Value> =
             serde_json::from_str(json_str).or_invalid("custom data not an object")?;
         require!(
-            object.keys().all(|k| k.as_bytes().len() <= 8),
+            object.keys().all(|k| k.len() <= 8),
             "custom data keys must be <= 8 bytes"
         );
         require!(
diff --git a/rslib/src/template.rs b/rslib/src/template.rs
index 39152da20..a24ffec5f 100644
--- a/rslib/src/template.rs
+++ b/rslib/src/template.rs
@@ -512,7 +512,7 @@ fn render_into(
     Ok(())
 }
 
-impl<'a> RenderContext<'a> {
+impl RenderContext<'_> {
     fn evaluate_conditional(&self, key: &str, negated: bool) -> TemplateResult<bool> {
         if self.nonempty_fields.contains(key) {
             Ok(true ^ negated)
@@ -904,7 +904,7 @@ fn find_field_references<'a>(
 
 fn is_cloze_conditional(key: &str) -> bool {
     key.strip_prefix('c')
-        .map_or(false, |s| s.parse::<u32>().is_ok())
+        .is_some_and(|s| s.parse::<u32>().is_ok())
 }
 
 // Tests
diff --git a/rslib/src/typeanswer.rs b/rslib/src/typeanswer.rs
index 5356a89a9..1432ad50d 100644
--- a/rslib/src/typeanswer.rs
+++ b/rslib/src/typeanswer.rs
@@ -140,7 +140,7 @@ fn isolate_leading_mark(text: &str) -> Cow<str> {
     if text
         .chars()
         .next()
-        .map_or(false, |c| GeneralCategory::of(c).is_mark())
+        .is_some_and(|c| GeneralCategory::of(c).is_mark())
     {
         Cow::Owned(format!("\u{a0}{text}"))
     } else {
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 2c8c4172d..81ba7b7d9 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
 # older versions may fail to compile; newer versions may fail the clippy tests
-channel = "1.82.0"
+channel = "1.84.0"