diff --git a/Cargo.lock b/Cargo.lock
index a63b196508fe19..70b48e40fbbe94 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2667,18 +2667,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.41"
+version = "1.0.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c16a64ba9387ef3fdae4f9c1a7f07a0997fce91985c0336f1ddc1822b3b37802"
+checksum = "a35fc5b8971143ca348fa6df4f024d4d55264f3468c71ad1c2f365b0a4d58c42"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.41"
+version = "1.0.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d14928354b01c4d6a4f0e549069adef399a284e7995c7ccca94e8a07a5346c59"
+checksum = "463fe12d7993d3b327787537ce8dd4dfa058de32fc2b195ef3cde03dc4771e8f"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2932,9 +2932,9 @@ checksum = "92888ba5573ff080736b3648696b70cafad7d250551175acbaa4e0385b3e1460"
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.9"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b15811caf2415fb889178633e7724bad2509101cde276048e013b9def5e51fa0"
+checksum = "22049a19f4a68748a168c0fc439f9516686aa045927ff767eca0a85101fb6e73"
 
 [[package]]
 name = "unicode-normalization"
diff --git a/Cargo.toml b/Cargo.toml
index 695729db04298a..1ca004af7be980 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -45,7 +45,7 @@ strum = { version = "0.24.1", features = ["strum_macros"] }
 strum_macros = { version = "0.24.3" }
 syn = { version = "2.0.15" }
 test-case = { version = "3.0.0" }
-thiserror = { version = "1.0.41" }
+thiserror = { version = "1.0.43" }
 toml = { version = "0.7.2" }
 
 # v0.0.1
diff --git a/crates/ruff/Cargo.toml b/crates/ruff/Cargo.toml
index 45f4b18c048f87..09a8c50c713f5a 100644
--- a/crates/ruff/Cargo.toml
+++ b/crates/ruff/Cargo.toml
@@ -73,7 +73,7 @@ shellexpand = { workspace = true }
 smallvec = { workspace = true }
 strum = { workspace = true }
 strum_macros = { workspace = true }
-thiserror = { version = "1.0.38" }
+thiserror = { version = "1.0.43" }
 toml = { workspace = true }
 typed-arena = { version = "2.0.2" }
 unicode-width = { version = "0.1.10" }
diff --git a/crates/ruff_python_formatter/src/lib.rs b/crates/ruff_python_formatter/src/lib.rs
index 5320998bbf0614..dcdf4497950be5 100644
--- a/crates/ruff_python_formatter/src/lib.rs
+++ b/crates/ruff_python_formatter/src/lib.rs
@@ -7,10 +7,9 @@ use ruff_formatter::format_element::tag;
 use ruff_formatter::prelude::{
     dynamic_text, source_position, source_text_slice, text, ContainsNewlines, Formatter, Tag,
 };
-// `write!` aliased for https://github.com/dtolnay/thiserror/issues/239
 use ruff_formatter::{
-    format, normalize_newlines, write as ruff_write, Buffer, Format, FormatElement, FormatError,
-    FormatResult, PrintError,
+    format, normalize_newlines, write, Buffer, Format, FormatElement, FormatError, FormatResult,
+    PrintError,
 };
 use ruff_formatter::{Formatted, Printed, SourceCode};
 use ruff_python_ast::node::{AnyNodeRef, AstNode, NodeKind};
@@ -55,9 +54,9 @@ where
 
     /// Formats the node without comments. Ignores any suppression comments.
     fn fmt_node(&self, node: &N, f: &mut PyFormatter) -> FormatResult<()> {
-        ruff_write!(f, [source_position(node.start())])?;
+        write!(f, [source_position(node.start())])?;
         self.fmt_fields(node, f)?;
-        ruff_write!(f, [source_position(node.end())])
+        write!(f, [source_position(node.end())])
     }
 
     /// Formats the node's fields.
@@ -228,10 +227,10 @@ impl Format<PyFormatContext<'_>> for VerbatimText {
 
         match normalize_newlines(f.context().locator().slice(self.0), ['\r']) {
             Cow::Borrowed(_) => {
-                ruff_write!(f, [source_text_slice(self.0, ContainsNewlines::Detect)])?;
+                write!(f, [source_text_slice(self.0, ContainsNewlines::Detect)])?;
             }
             Cow::Owned(cleaned) => {
-                ruff_write!(
+                write!(
                     f,
                     [
                         dynamic_text(&cleaned, Some(self.0.start())),