diff --git a/src/Data/CryptoID/Poly.hs b/src/Data/CryptoID/Poly.hs
index 67a7805..ba0af0f 100644
--- a/src/Data/CryptoID/Poly.hs
+++ b/src/Data/CryptoID/Poly.hs
@@ -26,13 +26,10 @@ module Data.CryptoID.Poly
 
 import Data.CryptoID.ByteString hiding (encrypt, decrypt)
 import qualified Data.CryptoID.ByteString as ByteString (encrypt, decrypt)
-import Data.CryptoID.Class (HasCryptoID)
 import qualified Data.CryptoID.Class as Class (HasCryptoID(..))
 
 import Data.Binary
 
-import Data.Monoid
-
 import Data.ByteString (ByteString)
 import qualified Data.ByteString as ByteString
 import qualified Data.ByteString.Lazy as Lazy.ByteString