diff --git a/cdevents-sdk/Cargo.toml b/cdevents-sdk/Cargo.toml
index 5275f76..b55806e 100644
--- a/cdevents-sdk/Cargo.toml
+++ b/cdevents-sdk/Cargo.toml
@@ -17,7 +17,7 @@ proptest = { version = "1.4", optional = true }
 proptest-derive = { version = "0.5", optional = true }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
-thiserror = "1.0"
+thiserror = "2.0"
 time = { version = "0.3", features = ["serde-human-readable"] }
 
 [dev-dependencies]