diff --git a/src/hashes/blake512.rs b/src/hashes/blake512.rs
index 585e165..2068c4a 100644
--- a/src/hashes/blake512.rs
+++ b/src/hashes/blake512.rs
@@ -17,7 +17,7 @@ impl Hasher for BLAKE512 {
     }
 
     fn digest(&mut self, bytes: impl AsRef<[u8]>) {
-        self.hasher.update(bytes.as_ref())
+        self.hasher.update(bytes)
     }
 
     fn complete(mut self) -> HashReturn {
diff --git a/src/hashes/md5.rs b/src/hashes/md5.rs
index 70d699c..545fdc4 100644
--- a/src/hashes/md5.rs
+++ b/src/hashes/md5.rs
@@ -15,7 +15,7 @@ impl Hasher for MD5 {
     }
 
     fn digest(&mut self, bytes: impl AsRef<[u8]>) {
-        self.hasher.update(bytes.as_ref())
+        self.hasher.update(bytes)
     }
 
     fn complete(mut self) -> HashReturn {
diff --git a/src/hashes/sha1.rs b/src/hashes/sha1.rs
index 0440a04..b2ecf4d 100644
--- a/src/hashes/sha1.rs
+++ b/src/hashes/sha1.rs
@@ -15,7 +15,7 @@ impl Hasher for SHA1 {
     }
 
     fn digest(&mut self, bytes: impl AsRef<[u8]>) {
-        self.hasher.update(bytes.as_ref())
+        self.hasher.update(bytes)
     }
 
     fn complete(mut self) -> HashReturn {