diff --git a/Crypto/KDF/HKDF.hs b/Crypto/KDF/HKDF.hs
index 5c10dbf..bd3b563 100644
--- a/Crypto/KDF/HKDF.hs
+++ b/Crypto/KDF/HKDF.hs
@@ -20,9 +20,9 @@ module Crypto.KDF.HKDF
     ) where
 
 import           Data.Word
-import           Crypto.Hash 
+import           Crypto.Hash
 import           Crypto.MAC.HMAC
-import           Crypto.Internal.ByteArray (ScrubbedBytes, Bytes, ByteArray, ByteArrayAccess)
+import           Crypto.Internal.ByteArray (ScrubbedBytes, ByteArray, ByteArrayAccess)
 import qualified Crypto.Internal.ByteArray as B
 import qualified Data.ByteString as BS