diff --git a/wtransport-proto/Cargo.toml b/wtransport-proto/Cargo.toml
index 704aa1c4..e13a659e 100644
--- a/wtransport-proto/Cargo.toml
+++ b/wtransport-proto/Cargo.toml
@@ -15,7 +15,7 @@ rust-version = "1.70"
 [dependencies]
 httlib-huffman = "0.3.4"
 octets = "0.3.0"
-thiserror = "1.0.50"
+thiserror = "2.0.3"
 url = "2.4.0"
 
 [dev-dependencies]
diff --git a/wtransport/Cargo.toml b/wtransport/Cargo.toml
index 4ee901ea..4126056b 100644
--- a/wtransport/Cargo.toml
+++ b/wtransport/Cargo.toml
@@ -39,7 +39,7 @@ rustls-pemfile = "2.1.3"
 rustls-pki-types = "1.8.0"
 sha2 = "0.10.8"
 socket2 = "0.5.3"
-thiserror = "1.0.40"
+thiserror = "2.0.3"
 time = "0.3.21"
 tokio = { version = "1.28.1", default-features = false, features = ["macros", "fs", "io-util"] }
 tracing = "0.1.37"