diff --git a/Crypto/Cipher/Blowfish/Primitive.hs b/Crypto/Cipher/Blowfish/Primitive.hs
index 9879760..d09eb4f 100644
--- a/Crypto/Cipher/Blowfish/Primitive.hs
+++ b/Crypto/Cipher/Blowfish/Primitive.hs
@@ -19,7 +19,7 @@ module Crypto.Cipher.Blowfish.Primitive
     ) where
 
 import Control.Monad (forM_)
-import Data.Vector (Vector, (!), (//))
+import Data.Vector ((!))
 import qualified Data.Vector as V
 import qualified Data.Vector.Mutable as V (unsafeRead, unsafeWrite)
 import Data.Bits
@@ -32,9 +32,6 @@ import Crypto.Internal.ByteArray
 import Crypto.Internal.Words
 import Crypto.Cipher.Blowfish.Box
 
-import Debug.Trace
-import Text.Printf
-
 -- | variable keyed blowfish state
 data Context = BF (Int -> Word32) -- p
                   (Int -> Word32) -- sbox0