diff --git a/src/meta_plugin/digest.rs b/src/meta_plugin/digest.rs
index 1f74579..821cafd 100644
--- a/src/meta_plugin/digest.rs
+++ b/src/meta_plugin/digest.rs
@@ -2,6 +2,7 @@ use sha2::{Digest, Sha256, Sha512};
 use md5;
 use crate::meta_plugin::MetaPlugin;
 use std::fmt;
+use std::io::Write;
 
 #[derive(Clone)]
 enum Hasher {