diff --git a/examples/simple-chat-client/Cargo.toml b/examples/simple-chat-client/Cargo.toml
index 9c84915..8d79222 100644
--- a/examples/simple-chat-client/Cargo.toml
+++ b/examples/simple-chat-client/Cargo.toml
@@ -9,7 +9,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 reqwest = { version = "0.12", features = ["json"] }
 anyhow = "1.0"
-thiserror = "1.0"
+thiserror = "2.0"
 async-trait = "0.1"
 futures = "0.3"
 toml = "0.8"