diff --git a/Cargo.lock b/Cargo.lock
index 336e1732..001000a3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1099,7 +1099,7 @@ dependencies = [
  "sha1",
  "sha2",
  "signature",
- "thiserror 1.0.69",
+ "thiserror 2.0.18",
  "tokio",
  "tokio-test",
  "tokio-tungstenite 0.21.0",
diff --git a/backend/Cargo.toml b/backend/Cargo.toml
index 3f74f7d2..41ce340a 100644
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -26,7 +26,7 @@ tower = "0.5"
 tower-http = { version = "0.6", features = ["trace", "cors", "decompression-gzip", "decompression-deflate"] }
 
 env_logger = "0.11"
-thiserror = "1"
+thiserror = "2"
 csv = "1"
 
 # SQLite used by the axum DB contract (Db::open/migrate/upsert/get/all)