diff --git a/src/compression_engine/lz4.rs b/src/compression_engine/lz4.rs
index a934a2f..9603e9f 100644
--- a/src/compression_engine/lz4.rs
+++ b/src/compression_engine/lz4.rs
@@ -3,6 +3,9 @@ use log::*;
 use std::io::Write;
 
 use lz4_flex::frame::{FrameDecoder, FrameEncoder};
+use std::fs::File;
+use std::io::{Read, Write};
+use std::path::PathBuf;
 
 use crate::compression_engine::CompressionEngine;
 
diff --git a/src/digest_engine.rs b/src/digest_engine.rs
index c7caf37..436cb69 100644
--- a/src/digest_engine.rs
+++ b/src/digest_engine.rs
@@ -1,4 +1,3 @@
-use std::io::Write;
 use anyhow::{anyhow, Result};
 
 use lazy_static::lazy_static;
diff --git a/src/digest_engine/none.rs b/src/digest_engine/none.rs
index a454954..2f1f1f6 100644
--- a/src/digest_engine/none.rs
+++ b/src/digest_engine/none.rs
@@ -1,7 +1,6 @@
 use anyhow::Result;
 use crate::digest_engine::DigestEngine;
 use std::io::Write;
-use std::io;
 
 #[derive(Debug, Eq, PartialEq, Clone, Default)]
 pub struct DigestEngineNone {}