diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index 0d0b0178..c0cc5bca 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -6366,7 +6366,7 @@ dependencies = [
  "tauri-plugin-process",
  "tauri-plugin-updater",
  "tauri-plugin-window-state",
- "thiserror 1.0.69",
+ "thiserror 2.0.18",
  "tokio",
  "tokio-stream",
  "windows-sys 0.61.2",
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index 34717063..34d783f5 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -44,7 +44,7 @@ zip = { version = "4", default-features = false, features = ["deflate"] }
 chrono = { version = "0.4.45", default-features = false, features = ["std"] }
 # Typed errors inside the db/excel connector (stringified only at the IPC edge).
 # Already transitive via sqlx.
-thiserror = "1"
+thiserror = "2"
 # Canonicalize without the \\?\ prefix (scope.rs): stored grants must match
 # user-visible paths or revoke's literal fallback can't find them.
 dunce = "1"