diff --git a/CHANGES.markdown b/CHANGES.markdown
--- a/CHANGES.markdown
+++ b/CHANGES.markdown
@@ -1,3 +1,9 @@
+0.3.0.1 (3 April 2013)
+----------------------
+
+* depend on cryptohash >= 0.8 && < 0.10 (use new unified API)
+* remove base16-bytestring dependency
+
 0.3: 3 Feburary 2013
 --------------------
 
diff --git a/diagrams-builder.cabal b/diagrams-builder.cabal
--- a/diagrams-builder.cabal
+++ b/diagrams-builder.cabal
@@ -1,5 +1,5 @@
 name:                diagrams-builder
-version:             0.3
+version:             0.3.0.1
 synopsis:            hint-based build service for the diagrams graphics EDSL.
 
 description:         @diagrams-builder@ provides backend-agnostic tools for
@@ -52,9 +52,8 @@
                        directory,
                        filepath,
                        haskell-src-exts >= 1.13.1 && < 1.14,
-                       cryptohash >= 0.7.4 && < 0.9,
+                       cryptohash >= 0.8 && < 0.10,
                        bytestring >= 0.9.2 && < 0.11,
-                       base16-bytestring >= 0.1.1 && < 0.2,
                        cmdargs >= 0.6 && < 0.11
   hs-source-dirs:      src
   default-language:    Haskell2010
diff --git a/src/Diagrams/Builder.hs b/src/Diagrams/Builder.hs
--- a/src/Diagrams/Builder.hs
+++ b/src/Diagrams/Builder.hs
@@ -49,10 +49,9 @@
 import System.FilePath
 import System.Directory
 
-import Crypto.Hash.MD5
+import Crypto.Hash (Digest, MD5, digestToHexByteString, hash)
 
 import qualified Data.ByteString.Char8 as B
-import Data.ByteString.Base16
 import Data.List (nub)
 import Data.Typeable
 deriving instance Typeable Any
@@ -248,8 +247,11 @@
                                         -- the diagram depends.
                  -> IO (String, Maybe (a -> a))
 hashedRegenerate upd dir src = do
-  let fileBase = B.unpack . encode . hash . B.pack $ src
+  let fileBase = hashStr src
   files <- getDirectoryContents dir
   case any ((fileBase==) . takeBaseName) files of
     True  -> return (fileBase, Nothing)
     False -> return (fileBase, Just (upd fileBase))
+
+hashStr :: String -> String
+hashStr = B.unpack . digestToHexByteString . (hash :: B.ByteString -> Digest MD5) . B.pack