diff --git a/Network/Wai/Middleware/Static.hs b/Network/Wai/Middleware/Static.hs
--- a/Network/Wai/Middleware/Static.hs
+++ b/Network/Wai/Middleware/Static.hs
@@ -27,8 +27,9 @@
 import Control.Monad.Trans (liftIO)
 import Data.List
 #if !(MIN_VERSION_base(4,8,0))
-import Data.Monoid
+import Data.Monoid (Monoid(..))
 #endif
+import Data.Semigroup (Semigroup(..))
 import Data.Time
 import Data.Time.Clock.POSIX
 import Network.HTTP.Types (status200, status304)
@@ -39,9 +40,10 @@
 #if !(MIN_VERSION_time(1,5,0))
 import System.Locale
 #endif
-import qualified Crypto.Hash.SHA1 as SHA1
+import Crypto.Hash.Algorithms
+import Crypto.Hash
+import Data.ByteArray.Encoding
 import qualified Data.ByteString as BS
-import qualified Data.ByteString.Base16 as B16
 import qualified Data.ByteString.Char8 as BSC
 import qualified Data.ByteString.Lazy as BSL
 import qualified Data.Text as T
@@ -65,11 +67,16 @@
    | CustomCaching (FileMeta -> RequestHeaders)
 
 -- | Note:
+--   '(<>)' == @>->@ (policy sequencing)
+instance Semigroup Policy where
+    p1 <> p2 = policy (maybe Nothing (tryPolicy p2) . tryPolicy p1)
+
+-- | Note:
 --   'mempty' == @policy Just@ (the always accepting policy)
 --   'mappend' == @>->@ (policy sequencing)
 instance Monoid Policy where
-    mempty = policy Just
-    mappend p1 p2 = policy (maybe Nothing (tryPolicy p2) . tryPolicy p1)
+    mempty  = policy Just
+    mappend = (<>)
 
 -- | Lift a function into a 'Policy'
 policy :: (String -> Maybe String) -> Policy
@@ -82,7 +89,7 @@
 -- | Sequence two policies. They are run from left to right. (Note: this is `mappend`)
 infixr 5 >->
 (>->) :: Policy -> Policy -> Policy
-(>->) = mappend
+(>->) = (<>)
 
 -- | Choose between two policies. If the first fails, run the second.
 infixr 4 <|>
@@ -257,7 +264,7 @@
        return $ FileMeta
                 { fm_lastModified =
                       BSC.pack $ formatTime defaultTimeLocale "%a, %d-%b-%Y %X %Z" mtime
-                , fm_etag = B16.encode (SHA1.hashlazy ct)
+                , fm_etag = convertToBase Base16 (hashlazy ct :: Digest SHA1)
                 , fm_fileName = fp
                 }
 
diff --git a/README.md b/README.md
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# wai-middleware-static [![Build Status](https://travis-ci.org/scotty-web/wai-middleware-static.svg)](https://travis-ci.org/scotty-web/wai-middleware-static)[![Coverage Status](https://coveralls.io/repos/scotty-web/wai-middleware-static/badge.png?branch=master)](https://coveralls.io/r/scotty-web/wai-middleware-static?branch=master)
+
+WAI middleware that intercepts requests to static files and serves them if they exist.
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,8 @@
+## 0.8.1
+* Add `Semigroup Policy` instance
+* Replace dependencies on `base16-bytestring` and `cryptohash` with the more
+  modern `memory` and `cryptonite` packages, respectively [myfreeweb]
+
 ## 0.8.0
 * The `mime-types` library is now used to lookup MIME types from extensions.
   As a result, some extensions now map to different MIME types. They are:
diff --git a/test/Main.hs b/test/Main.hs
new file mode 100644
--- /dev/null
+++ b/test/Main.hs
@@ -0,0 +1,4 @@
+module Main (main) where
+
+main :: IO ()
+main = return ()
diff --git a/wai-middleware-static.cabal b/wai-middleware-static.cabal
--- a/wai-middleware-static.cabal
+++ b/wai-middleware-static.cabal
@@ -1,5 +1,5 @@
 Name:                wai-middleware-static
-Version:             0.8.0
+Version:             0.8.1
 Synopsis:            WAI middleware that serves requests to static files.
 Homepage:            https://github.com/scotty-web/wai-middleware-static
 Bug-reports:         https://github.com/scotty-web/wai-middleware-static/issues
@@ -18,29 +18,40 @@
   .
   [WAI] <http://hackage.haskell.org/package/wai>
 
-Extra-source-files:    changelog.md
+Extra-source-files:    changelog.md, README.md
 
 Library
   Exposed-modules:     Network.Wai.Middleware.Static
   default-language:    Haskell2010
   Build-depends:
                        base               >= 4.6.0.1  && < 5,
-                       base16-bytestring  >= 0.1      && < 0.2,
                        bytestring         >= 0.10.0.2 && < 0.11,
                        containers         >= 0.5.0.0  && < 0.6,
-                       cryptohash         >= 0.11     && < 0.12,
+                       cryptonite         >= 0.10     && < 1.0,
+                       memory             >= 0.10     && < 1.0,
                        directory          >= 1.2.0.1  && < 1.3,
                        expiring-cache-map >= 0.0.5    && < 0.1,
                        filepath           >= 1.3.0.1  && < 1.5,
-                       http-types         >= 0.8.2    && < 0.9,
+                       http-types         >= 0.8.2    && < 0.10,
                        mime-types         >= 0.1.0.3  && < 0.2,
                        mtl                >= 2.1.2    && < 2.3,
                        old-locale         >= 1.0      && < 1.1,
+                       semigroups         >= 0.18     && < 1,
                        text               >= 0.11.3.1 && < 1.3,
-                       time               >= 1.4      && < 1.6,
-                       wai                >= 3.0.0    && < 3.1
+                       time               >= 1.4      && < 1.7,
+                       wai                >= 3.0.0    && < 3.3
 
   GHC-options: -Wall -fno-warn-orphans
+
+test-suite hpc-coveralls-stub
+  main-is:             Main.hs
+  type:                exitcode-stdio-1.0
+  default-language:    Haskell2010
+  hs-source-dirs:      test
+  build-depends:       base,
+                       hpc-coveralls,
+                       wai-middleware-static
+  ghc-options:         -Wall
 
 source-repository head
   type:     git