diff --git a/c-api/Cargo.lock b/c-api/Cargo.lock
index 25f79330..739cd374 100644
--- a/c-api/Cargo.lock
+++ b/c-api/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "allocator-api2"
@@ -40,9 +40,9 @@ checksum = "6245d59a3e82a7fc217c5828a6692dbc6dfb63a0c8c90495621f7b9d79704a0e"
 
 [[package]]
 name = "cssparser"
-version = "0.27.2"
+version = "0.29.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "754b69d351cdc2d8ee09ae203db831e005560fc6030da058f86ad60c92a9cb0a"
+checksum = "f93d03419cb5950ccfd3daf3ff1c7a36ace64609a1a8746d493df1ca0afde0fa"
 dependencies = [
  "cssparser-macros",
  "dtoa-short",
@@ -147,21 +147,9 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "0.4.8"
+version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b71991ff56294aa922b450139ee08b3bfc70982c6b2c7562771375cf73542dd4"
-
-[[package]]
-name = "lazy_static"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
-
-[[package]]
-name = "lazycell"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
 
 [[package]]
 name = "libc"
@@ -184,8 +172,6 @@ dependencies = [
  "cssparser",
  "encoding_rs",
  "hashbrown",
- "lazy_static",
- "lazycell",
  "memchr",
  "mime",
  "selectors",
@@ -381,22 +367,20 @@ dependencies = [
 
 [[package]]
 name = "selectors"
-version = "0.22.0"
+version = "0.24.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df320f1889ac4ba6bc0cdc9c9af7af4bd64bb927bccdf32d81140dc1f9be12fe"
+checksum = "0c37578180969d00692904465fb7f6b3d50b9a2b952b87c23d0e2e5cb5013416"
 dependencies = [
  "bitflags 1.3.2",
  "cssparser",
  "derive_more",
  "fxhash",
  "log",
- "matches",
  "phf",
  "phf_codegen",
  "precomputed-hash",
  "servo_arc",
  "smallvec",
- "thin-slice",
 ]
 
 [[package]]
@@ -407,9 +391,9 @@ checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
 
 [[package]]
 name = "servo_arc"
-version = "0.1.1"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d98238b800e0d1576d8b6e3de32827c2d74bee68bb97748dcf5071fb53965432"
+checksum = "d52aa42f8fdf0fed91e5ce7f23d8138441002fa31dca008acf47e6fd4721f741"
 dependencies = [
  "nodrop",
  "stable_deref_trait",
@@ -455,26 +439,20 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "thin-slice"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8eaa81235c7058867fa8c0e7314f33dcce9c215f535d1913822a2b3f5e289f3c"
-
 [[package]]
 name = "thiserror"
-version = "1.0.68"
+version = "2.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02dd99dc800bbb97186339685293e1cc5d9df1f8fae2d0aecd9ff1c77efea892"
+checksum = "2f49a1853cf82743e3b7950f77e0f4d622ca36cf4317cba00c767838bac8d490"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.68"
+version = "2.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a7c61ec9a6f64d2793d8a45faba21efbe3ced62a886d44c36a009b2b519b4c7e"
+checksum = "8381894bb3efe0c4acac3ded651301ceee58a15d47c2e34885ed1908ad667061"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/c-api/src/lib.rs b/c-api/src/lib.rs
index 04523d7d..7d77a08c 100644
--- a/c-api/src/lib.rs
+++ b/c-api/src/lib.rs
@@ -1,3 +1,5 @@
+#![allow(clippy::missing_safety_doc)]
+
 pub use crate::streaming::CStreamingHandler;
 use libc::{c_char, c_int, c_void, size_t};
 use lol_html::html_content::*;
diff --git a/c-api/src/rewriter_builder.rs b/c-api/src/rewriter_builder.rs
index e219087c..04cb3ceb 100644
--- a/c-api/src/rewriter_builder.rs
+++ b/c-api/src/rewriter_builder.rs
@@ -58,6 +58,7 @@ pub struct ExternDocumentContentHandlers {
 }
 
 impl ExternDocumentContentHandlers {
+    #[must_use]
     pub fn as_safe_document_content_handlers(&self) -> DocumentContentHandlers {
         let mut handlers = DocumentContentHandlers::default();
 
@@ -77,6 +78,7 @@ pub struct ExternElementContentHandlers {
 }
 
 impl ExternElementContentHandlers {
+    #[must_use]
     pub fn as_safe_element_content_handlers(&self) -> ElementContentHandlers {
         let mut handlers = ElementContentHandlers::default();
 
@@ -100,6 +102,7 @@ pub struct HtmlRewriterBuilder {
 }
 
 impl HtmlRewriterBuilder {
+    #[must_use]
     pub fn get_safe_handlers(&self) -> SafeContentHandlers {
         SafeContentHandlers {
             document: self
diff --git a/c-api/src/streaming.rs b/c-api/src/streaming.rs
index 426edffd..f827c96e 100644
--- a/c-api/src/streaming.rs
+++ b/c-api/src/streaming.rs
@@ -59,6 +59,7 @@ pub unsafe extern "C" fn lol_html_streaming_sink_write_utf8_chunk(
 }
 
 /// Safety: the user data and the callbacks must be safe to use from a different thread (e.g. can't rely on thread-local storage).
+///
 /// It doesn't have to be `Sync`, it will be used only by one thread at a time.
 ///
 /// Handler functions copy this struct. It can (and should) be created on the stack.
diff --git a/c-api/src/string.rs b/c-api/src/string.rs
index fc707056..1794d037 100644
--- a/c-api/src/string.rs
+++ b/c-api/src/string.rs
@@ -35,7 +35,7 @@ impl Str {
 
 impl Drop for Str {
     fn drop(&mut self) {
-        if self.data == ptr::null() {
+        if self.data.is_null() {
             return;
         }
         let bytes = unsafe { slice::from_raw_parts_mut(self.data.cast_mut(), self.len) };
diff --git a/js-api/src/html_rewriter.rs b/js-api/src/html_rewriter.rs
index 129e1753..c8f4c8a8 100644
--- a/js-api/src/html_rewriter.rs
+++ b/js-api/src/html_rewriter.rs
@@ -49,12 +49,12 @@ pub struct HTMLRewriter(RewriterState);
 #[wasm_bindgen]
 impl HTMLRewriter {
     #[wasm_bindgen(constructor)]
-    pub fn new(encoding: String, output_sink: &JsFunction) -> JsResult<HTMLRewriter> {
+    pub fn new(encoding: String, output_sink: &JsFunction) -> JsResult<Self> {
         let encoding = Encoding::for_label(encoding.as_bytes())
             .and_then(AsciiCompatibleEncoding::new)
             .ok_or_else(|| JsError::new("Invalid encoding"))?;
 
-        Ok(HTMLRewriter(RewriterState::Before {
+        Ok(Self(RewriterState::Before {
             output_sink: JsOutputSink::new(output_sink),
             settings: Settings {
                 encoding,