diff --git a/scotty-format.cabal b/scotty-format.cabal
--- a/scotty-format.cabal
+++ b/scotty-format.cabal
@@ -1,5 +1,5 @@
 name:                scotty-format
-version:             0.1.0.2
+version:             0.1.1.0
 synopsis:            Response format helper for the Scotty web framework.
 description:
   scotty-format is a helper for the Scotty web framework that helps you defining
@@ -20,7 +20,7 @@
   exposed-modules:     Web.Scotty.Format.Trans
   ghc-options:         -Wall
   build-depends:
-    base >= 4.8.2 && < 4.9,
+    base >= 4.8.2 && < 4.10,
     http-media >= 0.6.4 && < 0.7,
     http-types >= 0.9.1 && < 0.10,
     scotty >= 0.11 && < 0.12,
diff --git a/src/Web/Scotty/Format/Trans.hs b/src/Web/Scotty/Format/Trans.hs
--- a/src/Web/Scotty/Format/Trans.hs
+++ b/src/Web/Scotty/Format/Trans.hs
@@ -5,7 +5,8 @@
   formatHtml,
   formatText,
   formatJson,
-  format
+  format,
+  ResponseFormat,
 ) where
 
 import Control.Monad (liftM, ap)
@@ -51,9 +52,9 @@
 format mediaType action = RF [(mediaType, action)] ()
 
 
--- Private
-
 data ResponseFormat e m a = RF [(MediaType, ActionT e m ())] a
+
+-- Private
 
 instance Monad (ResponseFormat e m) where
   return = RF []