diff --git a/src/digest_engine/sha2.rs b/src/digest_engine/sha2.rs
index ba8c89e..0aa7259 100644
--- a/src/digest_engine/sha2.rs
+++ b/src/digest_engine/sha2.rs
@@ -1,4 +1,5 @@
 use std::io;
+use sha2::{Digest, Sha256};
 
 #[derive(Debug, Eq, PartialEq, Clone, Default)]
 pub struct DigestEngineSha256 {