diff --git a/Cargo.toml b/Cargo.toml
index d31b104..0e7919b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ solana-program = "=1.18.26"
 borsh = "1.5"
 bytemuck = { version = "1.14", features = ["derive"] }
 bs58 = "0.5"
-thiserror = "1.0"
+thiserror = "2.0"
 curve25519-dalek = { version = "4.1", default-features = false, features = ["alloc"] }
 
 [profile.release]