diff --git a/Cargo.toml b/Cargo.toml
index 0e973465..119c70e1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -60,7 +60,7 @@ slog-scope = { version = "4.0" }
 slog-stdlog = { version = "4.1.1" }
 smallvec = { version = "1.10", default-features = false }
 task-killswitch = { version = "0.1.0", path = "./task-killswitch" }
-thiserror = { version = "1" }
+thiserror = { version = "2" }
 tokio = { version = "1.29", default-features = false }
 tokio-fcquiche = { version = "0.1.0", path = "./tokio-fcquiche" }
 tokio-quiche = { path = "./tokio-quiche" }