diff --git a/Cargo.toml b/Cargo.toml
index 885f0a3..b2ed4b9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ nested-values = [
 ]
 
 [dev-dependencies]
-thiserror = "1.0"
+thiserror = "2.0"
 serde_json = "1.0"
 slog-term = "2.9"
 slog-json = "2.6"