diff --git a/ChangeLog.md b/ChangeLog.md
new file mode 100644
--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,3 @@
+## 3.0.3
+
+Add the `AddHeaders` middleware.
diff --git a/Network/Wai/Middleware/AddHeaders.hs b/Network/Wai/Middleware/AddHeaders.hs
new file mode 100644
--- /dev/null
+++ b/Network/Wai/Middleware/AddHeaders.hs
@@ -0,0 +1,30 @@
+-- |
+--
+-- Since 3.0.3
+module Network.Wai.Middleware.AddHeaders
+    ( addHeaders
+    ) where
+
+import Network.HTTP.Types   (ResponseHeaders, Header)
+import Network.Wai          (Middleware)
+import Network.Wai.Internal (Response(..))
+import Data.ByteString      (ByteString)
+
+import qualified Data.CaseInsensitive as CI
+import Control.Arrow (first)
+
+addHeaders :: [(ByteString, ByteString)] -> Middleware
+-- ^ Prepend a list of headers without any checks
+--
+-- Since 3.0.3
+
+addHeaders h app req respond = app req $ respond . addHeaders' (map (first CI.mk) h)
+
+mapHeader :: (ResponseHeaders -> ResponseHeaders) -> Response -> Response
+mapHeader f (ResponseFile s h b1 b2) = ResponseFile s (f h) b1 b2
+mapHeader f (ResponseBuilder s h b) = ResponseBuilder s (f h) b
+mapHeader f (ResponseStream s h b) = ResponseStream s (f h) b
+mapHeader _ r@(ResponseRaw _ _) = r
+
+addHeaders' :: [Header] -> Response -> Response
+addHeaders' h = mapHeader (\hs -> h ++ hs)
diff --git a/README.md b/README.md
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+## wai-extra
+
+The goal here is to provide common features without many dependencies.
diff --git a/wai-extra.cabal b/wai-extra.cabal
--- a/wai-extra.cabal
+++ b/wai-extra.cabal
@@ -1,5 +1,5 @@
 Name:                wai-extra
-Version:             3.0.2.2
+Version:             3.0.3
 Synopsis:            Provides some basic WAI handlers and middleware.
 Description:         The goal here is to provide common features without many dependencies.
 License:             MIT
@@ -16,6 +16,8 @@
   test/json
   test/test.html
   test/sample.hs
+  ChangeLog.md
+  README.md
 
 Library
   Build-Depends:     base                      >= 4 && < 5
@@ -52,6 +54,7 @@
   Exposed-modules:   Network.Wai.Handler.CGI
                      Network.Wai.Handler.SCGI
                      Network.Wai.Middleware.AcceptOverride
+                     Network.Wai.Middleware.AddHeaders
                      Network.Wai.Middleware.Autohead
                      Network.Wai.Middleware.CleanPath
                      Network.Wai.Middleware.Local