diff --git a/WaiAppStatic/Storage/Embedded.hs b/WaiAppStatic/Storage/Embedded.hs
--- a/WaiAppStatic/Storage/Embedded.hs
+++ b/WaiAppStatic/Storage/Embedded.hs
@@ -15,7 +15,8 @@
 import qualified Data.Text as T
 import Data.Ord
 import qualified Data.ByteString as S
-import qualified Crypto.Hash.MD5 as MD5
+import qualified Crypto.Classes as CR
+import Crypto.Hash.CryptoAPI (hash', MD5)
 import qualified Data.ByteString.Base64 as B64
 import WaiAppStatic.Storage.Filesystem (defaultFileServerSettings)
 
@@ -89,4 +90,4 @@
     }
 
 runHash :: ByteString -> ByteString
-runHash = B64.encode . MD5.hash
+runHash = B64.encode . CR.encode . (hash' :: S.ByteString -> MD5)
diff --git a/WaiAppStatic/Storage/Filesystem.hs b/WaiAppStatic/Storage/Filesystem.hs
--- a/WaiAppStatic/Storage/Filesystem.hs
+++ b/WaiAppStatic/Storage/Filesystem.hs
@@ -27,7 +27,7 @@
 import Data.Maybe (catMaybes)
 import qualified Crypto.Conduit
 import Data.Serialize (encode)
-import Crypto.Hash.MD5 (MD5)
+import Crypto.Hash.CryptoAPI (MD5)
 import qualified Data.ByteString.Base64 as B64
 
 -- | Construct a new path from a root and some @Pieces@.
diff --git a/wai-app-static.cabal b/wai-app-static.cabal
--- a/wai-app-static.cabal
+++ b/wai-app-static.cabal
@@ -1,5 +1,5 @@
 name:            wai-app-static
-version:         1.3.1.3
+version:         1.3.1.4
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
@@ -37,7 +37,8 @@
                    , text                      >= 0.7
                    , blaze-builder             >= 0.2.1.4
                    , base64-bytestring         >= 0.1
-                   , cryptohash                >= 0.7
+                   , crypto-api                >= 0.12.2
+                   , cryptohash-cryptoapi      >= 0.1.0
                    , system-filepath           >= 0.4
                    , system-fileio             >= 0.3
                    , http-date