diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index d9842f0..e9c21d6 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -31,7 +31,7 @@ tokio-util = "0.7"  # CancellationToken for streaming cancellation (issue #25)
 # Utilities
 uuid = { version = "1", features = ["v4", "serde"] }
 chrono = { version = "0.4", features = ["serde"] }
-thiserror = "1"
+thiserror = "2"
 
 # HTTP client for Claude API
 reqwest = { version = "0.12", features = ["json", "stream"] }