diff --git a/Network/Mail/Mime/SES.hs b/Network/Mail/Mime/SES.hs
--- a/Network/Mail/Mime/SES.hs
+++ b/Network/Mail/Mime/SES.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE FlexibleContexts #-}
 module Network.Mail.Mime.SES
@@ -15,7 +16,11 @@
 import Data.Time (getCurrentTime)
 import qualified Data.ByteString.Char8 as S8
 import Crypto.HMAC
+#if MIN_VERSION_cryptohash(0, 10, 0)
+import Crypto.Hash.CryptoAPI (SHA256)
+#else
 import Crypto.Hash.SHA256 (SHA256)
+#endif
 import Data.ByteString.Base64 (encode)
 import qualified Data.Serialize as S
 import Control.Monad.Trans.Resource (MonadResource)
diff --git a/mime-mail-ses.cabal b/mime-mail-ses.cabal
--- a/mime-mail-ses.cabal
+++ b/mime-mail-ses.cabal
@@ -1,5 +1,5 @@
 Name:                mime-mail-ses
-Version:             0.2.1.2
+Version:             0.2.1.3
 Synopsis:            Send mime-mail messages via Amazon SES
 Homepage:            http://github.com/snoyberg/mime-mail
 License:             MIT
@@ -26,4 +26,5 @@
                      , transformers       >= 0.2
                      , http-types         >= 0.6.8
                      , monad-control      >= 0.3
+                     , cryptohash-cryptoapi
   ghc-options: -Wall