diff --git a/Cargo.toml b/Cargo.toml
index 7562d2b..4546c08 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ edition = "2021"
 
 [dependencies]
 itertools = "0.13"
-thiserror = "1.0"
+thiserror = "2.0"
 
 [badges]
 travis-ci = { repository = "nozaq/usi-rs" }