diff --git a/src/Web/Twain.hs b/src/Web/Twain.hs
--- a/src/Web/Twain.hs
+++ b/src/Web/Twain.hs
@@ -39,7 +39,7 @@
     route,
     notFound,
 
-    -- * Request and Parameters
+    -- * Requests
     param,
     paramEither,
     paramMaybe,
@@ -77,6 +77,9 @@
     withParseBodyOpts,
     withMaxBodySize,
 
+    -- * Parameters
+    ParsableParam (..),
+
     -- * Re-exports
     module Network.HTTP.Types,
     module Network.Wai,
@@ -101,7 +104,6 @@
 import Data.Word (Word64)
 import Network.HTTP.Types
 import Network.Wai
-import Network.Wai.Handler.Warp hiding (FileInfo)
 import Network.Wai.Parse hiding (Param)
 import Network.Wai.Request
 import System.Environment (lookupEnv)
diff --git a/src/Web/Twain/Internal.hs b/src/Web/Twain/Internal.hs
--- a/src/Web/Twain/Internal.hs
+++ b/src/Web/Twain/Internal.hs
@@ -18,7 +18,6 @@
 import Network.HTTP.Types (Method, hCookie, mkStatus, status204, status400, status413, status500)
 import Network.HTTP2 (ErrorCodeId (..), HTTP2Error (..))
 import Network.Wai (Application, Middleware, Request (..), lazyRequestBody, queryString, requestHeaders, requestMethod, responseLBS)
-import Network.Wai.Handler.Warp (defaultOnExceptionResponse)
 import Network.Wai.Parse (File, ParseRequestBodyOptions, lbsBackEnd, noLimitParseRequestBodyOptions, parseRequestBodyEx)
 import Network.Wai.Request (RequestSizeException (..), requestSizeCheck)
 import System.IO.Unsafe (unsafePerformIO)
diff --git a/twain.cabal b/twain.cabal
--- a/twain.cabal
+++ b/twain.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           twain
-version:        2.0.0.0
+version:        2.0.1.0
 synopsis:       Tiny web application framework for WAI.
 description:    Twain is tiny web application framework for WAI. It provides routing, parameter parsing, and an either-like monad for composing responses.
 category:       Web
@@ -43,12 +43,11 @@
     , either ==5.0.*
     , exceptions ==0.10.*
     , http-types ==0.12.*
-    , http2 >=2.0 && <3.1
+    , http2 >=1.0.0 && <3.3.0
     , text >=1.2.3 && <1.3
     , time >=1.8 && <1.9.9
     , transformers >=0.5.6 && <0.6
     , vault ==0.3.*
     , wai ==3.2.*
     , wai-extra >=3.0 && <3.2
-    , warp >=3.2 && <3.4
   default-language: Haskell2010