diff --git a/Cargo.lock b/Cargo.lock
index 4f8b7f211ed..26a3263ad17 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -310,7 +310,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -457,7 +457,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13b588ba4ac1a99f7f2964d24b3d896ddc6bf847ee3855dbd4366f058cfcd331"
 dependencies = [
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -505,7 +505,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "scratch",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -522,7 +522,7 @@ checksum = "a1719100f31492cd6adeeab9a0f46cdbc846e615fdb66d7b398aa46ec7fdd06f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -691,7 +691,7 @@ name = "error-handling"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "thiserror",
+ "thiserror 2.0.3",
 ]
 
 [[package]]
@@ -822,7 +822,7 @@ checksum = "162ee34ebcb7c64a8abebc059ce0fee27c2262618d7b60ed8faf72fef13c3650"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -942,7 +942,7 @@ checksum = "f5070fa86976044fe2b004d874c10af5d1aed6d8f6a72ff93a6eb29cc87048bc"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -994,7 +994,7 @@ dependencies = [
  "pest_derive",
  "serde",
  "serde_json",
- "thiserror",
+ "thiserror 1.0.69",
 ]
 
 [[package]]
@@ -1050,7 +1050,7 @@ dependencies = [
  "markup5ever 0.12.1",
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -1064,7 +1064,7 @@ dependencies = [
  "markup5ever 0.14.0",
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -1408,7 +1408,7 @@ dependencies = [
 name = "lifetimes"
 version = "0.1.0"
 dependencies = [
- "thiserror",
+ "thiserror 2.0.3",
 ]
 
 [[package]]
@@ -1669,7 +1669,7 @@ dependencies = [
  "cfg-if",
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -1804,7 +1804,7 @@ checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -1871,7 +1871,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ae9cee2a55a544be8b89dc6848072af97a20f2422603c10865be2a42b580fff5"
 dependencies = [
  "memchr",
- "thiserror",
+ "thiserror 1.0.69",
  "ucd-trie",
 ]
 
@@ -1895,7 +1895,7 @@ dependencies = [
  "pest_meta",
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -1959,7 +1959,7 @@ dependencies = [
  "phf_shared 0.11.2",
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -1997,7 +1997,7 @@ checksum = "4359fd9c9171ec6e8c62926d6faaf553a8dc3f64e1507e76da7911b4f6a04405"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -2075,9 +2075,9 @@ 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",
 ]
@@ -2442,7 +2442,7 @@ checksum = "de523f781f095e28fa605cdce0f8307e451cc0fd14e2eb4cd2e98a355b147766"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -2643,7 +2643,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustversion",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -2665,9 +2665,9 @@ dependencies = [
 
 [[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",
@@ -2681,7 +2681,7 @@ dependencies = [
  "reqwest",
  "scraper",
  "tempfile",
- "thiserror",
+ "thiserror 2.0.3",
 ]
 
 [[package]]
@@ -2769,22 +2769,42 @@ version = "0.1.0"
 
 [[package]]
 name = "thiserror"
-version = "1.0.66"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d171f59dbaa811dbbb1aee1e73db92ec2b122911a48e1390dfe327a821ddede"
+checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
 dependencies = [
- "thiserror-impl",
+ "thiserror-impl 1.0.69",
+]
+
+[[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]]
+name = "thiserror-impl"
+version = "1.0.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.90",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.66"
+version = "2.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b08be0f17bd307950653ce45db00cd31200d82b624b36e181337d9c7d92765b5"
+checksum = "f077553d607adc1caf65430528a576c757a71ed73944b66ebb58ef2bbd243568"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -2859,7 +2879,7 @@ checksum = "693d596312e88961bc67d7f1f97af8a70227d9f90c31bba5806eec004978d752"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -3020,7 +3040,7 @@ dependencies = [
  "log",
  "rand",
  "sha1",
- "thiserror",
+ "thiserror 1.0.69",
  "url",
  "utf-8",
 ]
@@ -3221,7 +3241,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
  "wasm-bindgen-shared",
 ]
 
@@ -3255,7 +3275,7 @@ checksum = "f0eb82fcb7930ae6219a7ecfd55b217f5f0893484b7a13022ebb2b2bf20b5283"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -3290,7 +3310,7 @@ dependencies = [
  "serde",
  "serde_derive",
  "serde_json",
- "thiserror",
+ "thiserror 1.0.69",
  "time",
  "unicode-segmentation",
  "url",
@@ -3540,7 +3560,7 @@ checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
@@ -3551,7 +3571,7 @@ checksum = "3cd137b4cc21bde6ecce3bbbb3350130872cda0be2c6888874279ea76e17d4c1"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.86",
+ "syn 2.0.90",
 ]
 
 [[package]]
diff --git a/src/concurrency/sync-exercises/Cargo.toml b/src/concurrency/sync-exercises/Cargo.toml
index 0b125c18763..4307c1773f2 100644
--- a/src/concurrency/sync-exercises/Cargo.toml
+++ b/src/concurrency/sync-exercises/Cargo.toml
@@ -15,7 +15,7 @@ path = "link-checker.rs"
 [dependencies]
 reqwest = { version = "0.12.9", features = ["blocking"] }
 scraper = "0.21.0"
-thiserror = "1.0.66"
+thiserror = "2.0.3"
 
 [dev-dependencies]
 tempfile = "3.14.0"