diff --git a/Cargo.lock b/Cargo.lock
index 1995ca5..c321967 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -184,7 +184,7 @@ version = "1.0.3"
 dependencies = [
  "anstyle 1.0.10",
  "syntect",
- "thiserror",
+ "thiserror 2.0.3",
 ]
 
 [[package]]
@@ -631,9 +631,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.89"
+version = "1.0.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f139b0662de085916d1fb67d2b4169d1addddda1919e696f3252b740b629986e"
+checksum = "37d3544b3f2748c54e147655edb5025752e2303145b5aefb3c3ea2c78b973bb0"
 dependencies = [
  "unicode-ident",
 ]
@@ -882,9 +882,9 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "syn"
-version = "2.0.86"
+version = "2.0.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e89275301d38033efb81a6e60e3497e734dfcc62571f2854bf4b16690398824c"
+checksum = "919d3b74a5dd0ccd15aeb8f93e7006bd9e14c295087c9896a110f490752bcf31"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -902,7 +902,7 @@ dependencies = [
  "serde",
  "serde_derive",
  "serde_json",
- "thiserror",
+ "thiserror 1.0.66",
  "walkdir",
 ]
 
@@ -944,7 +944,16 @@ version = "1.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5d171f59dbaa811dbbb1aee1e73db92ec2b122911a48e1390dfe327a821ddede"
 dependencies = [
- "thiserror-impl",
+ "thiserror-impl 1.0.66",
+]
+
+[[package]]
+name = "thiserror"
+version = "2.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c006c85c7651b3cf2ada4584faa36773bd07bac24acfb39f3c431b36d7e667aa"
+dependencies = [
+ "thiserror-impl 2.0.3",
 ]
 
 [[package]]
@@ -958,6 +967,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "thiserror-impl"
+version = "2.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f077553d607adc1caf65430528a576c757a71ed73944b66ebb58ef2bbd243568"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "unarray"
 version = "0.1.4"
diff --git a/crates/anstyle-syntect/Cargo.toml b/crates/anstyle-syntect/Cargo.toml
index 8fac658..b551737 100644
--- a/crates/anstyle-syntect/Cargo.toml
+++ b/crates/anstyle-syntect/Cargo.toml
@@ -29,7 +29,7 @@ anstyle = { version = "1.0.0", path = "../anstyle" }
 syntect = { version = "5.0.0", default-features = false }
 
 [target.'cfg(any())'.dependencies]
-thiserror = "1.0.2"  # HACK: bad minimal dep in syntect
+thiserror = "2.0.0"  # HACK: bad minimal dep in syntect
 
 [lints]
 workspace = true