diff --git a/digestive-functors-scotty.cabal b/digestive-functors-scotty.cabal
--- a/digestive-functors-scotty.cabal
+++ b/digestive-functors-scotty.cabal
@@ -1,5 +1,5 @@
 name:                digestive-functors-scotty
-version:             0.1.1.0
+version:             0.2.0.0
 synopsis:            Scotty backend for the digestive-functors library
 description:         Scotty backend for the digestive-functors library
 homepage:            https://bitbucket.org/wniare/digestive-functors-scotty
@@ -17,14 +17,14 @@
 
   exposed-modules:     Text.Digestive.Scotty
 
-  build-depends:       base               ==4.5.*
-                     , digestive-functors ==0.6.*
-                     , scotty             ==0.5.*
-                     , bytestring         ==0.9.*
+  build-depends:       base               ==4.*
+                     , digestive-functors ==0.7.*
+                     , scotty             ==0.7.*
+                     , bytestring         >=0.9   && <0.11
                      , http-types         ==0.8.*
-                     , text               ==0.11.*
-                     , wai                ==1.4.*
-                     , wai-extra          ==1.3.*
+                     , text               >=0.11  && <1.0
+                     , wai                >=2.0.0 && <2.2
+                     , wai-extra          >=2.0.1 && <2.2
 
 source-repository head
   Type: git
diff --git a/src/Text/Digestive/Scotty.hs b/src/Text/Digestive/Scotty.hs
--- a/src/Text/Digestive/Scotty.hs
+++ b/src/Text/Digestive/Scotty.hs
@@ -16,7 +16,7 @@
 import Text.Digestive.Types
 import Text.Digestive.View
 
-scottyEnv :: Monad m => Env (Scotty.ActionT m)
+scottyEnv :: (Monad m, Scotty.ScottyError e) => Env (Scotty.ActionT e m)
 scottyEnv path = do
     inputs <- parse (TextInput . TL.toStrict) Scotty.params
     files  <- parse (FileInput . B.unpack . fileName) Scotty.files
@@ -25,12 +25,12 @@
         name    = TL.fromStrict . fromPath $ path
 
 -- | Runs a form with the HTTP input provided by Scotty.
-runForm :: Monad m
-        => T.Text                               -- ^ Name of the form
-        -> Form v (Scotty.ActionT m) a          -- ^ Form to run
-        -> (Scotty.ActionT m) (View v, Maybe a) -- ^ Result
+runForm :: (Monad m, Scotty.ScottyError e)
+        => T.Text                                 -- ^ Name of the form
+        -> Form v (Scotty.ActionT e m) a          -- ^ Form to run
+        -> (Scotty.ActionT e m) (View v, Maybe a) -- ^ Result
 runForm name form = Scotty.request >>= \rq ->
     if requestMethod rq == methodGet
         then getForm name form >>= \v -> return (v, Nothing)
-        else postForm name form scottyEnv
+        else postForm name form $ const (return scottyEnv)