diff --git a/Data/Digest/Pure/MD5.hs b/Data/Digest/Pure/MD5.hs
--- a/Data/Digest/Pure/MD5.hs
+++ b/Data/Digest/Pure/MD5.hs
@@ -8,14 +8,14 @@
 -- Portability : portable, requires bang patterns and ByteString
 -- Tested with : GHC-6.8.1
 --
--- |To get an MD5 digest of a lazy ByteString (you probably want this):
---   hash = md5 lazyByteString
+-- | It is suggested you use the 'crypto-api' class-based interface to access the MD5 algorithm.
+-- Either rely on type inference or provide an explicit type:
 --
--- Alternativly, for a context that can be further updated/finalized:
---   partialCtx = md5Update md5InitialContext partOfFile
+-- @
+--   hashFileStrict = liftM hash' B.readFile
+--   hashFileLazyBS = liftM hash B.readFile
+-- @
 --
--- And you finialize the context with:
---   hash = md5Finalize partialCtx
 -----------------------------------------------------------------------------
 
 module Data.Digest.Pure.MD5
@@ -25,11 +25,12 @@
         , MD5Digest
         -- * Static data
         , md5InitialContext
-        , blockSize
         -- * Functions
         , md5
         , md5Update
         , md5Finalize
+	-- * Crypto-API interface
+	, Hash(..)
         ) where
 
 import Data.ByteString.Unsafe (unsafeUseAsCString)
@@ -50,7 +51,7 @@
 import qualified Data.Serialize.Get as G
 import qualified Data.Serialize.Put as P
 import qualified Data.Serialize as S
-import Crypto.Classes
+import Crypto.Classes (Hash(..), hash)
 import Data.Tagged
 import Numeric
 
diff --git a/pureMD5.cabal b/pureMD5.cabal
--- a/pureMD5.cabal
+++ b/pureMD5.cabal
@@ -1,5 +1,5 @@
 name:		pureMD5
-version:	2.0.0.0
+version:	2.1.0.0
 license:	BSD3
 license-file:	LICENSE
 author:		Thomas DuBuisson <thomas.dubuisson@gmail.com>
@@ -23,7 +23,7 @@
   default: False
 
 Library
-  Build-Depends: base == 4.*, bytestring >= 0.9 && < 0.10, binary >= 0.4.0 && < 0.6.0, cereal >= 0.2, crypto-api >= 0.0.0.1, tagged
+  Build-Depends: base == 4.*, bytestring >= 0.9 && < 0.10, binary >= 0.4.0 && < 0.6.0, cereal >= 0.2 && < 0.4, crypto-api < 0.2, tagged
   ghc-options:	-O2 -funfolding-use-threshold66 -funfolding-creation-threshold66 -fexcess-precision -funbox-strict-fields
   hs-source-dirs:
   exposed-modules: Data.Digest.Pure.MD5