diff --git a/lee/state_machine/src/signature/mod.rs b/lee/state_machine/src/signature/mod.rs
index 2b6732c3..ba049419 100644
--- a/lee/state_machine/src/signature/mod.rs
+++ b/lee/state_machine/src/signature/mod.rs
@@ -1,7 +1,7 @@
 use std::str::FromStr;
 
 use borsh::{BorshDeserialize, BorshSerialize};
-use k256::ecdsa::signature::hazmat::PrehashVerifier;
+use k256::ecdsa::signature::hazmat::PrehashVerifier as _;
 pub use private_key::PrivateKey;
 pub use public_key::PublicKey;
 use rand::{RngCore as _, rngs::OsRng};