diff --git a/digestive-functors.cabal b/digestive-functors.cabal
--- a/digestive-functors.cabal
+++ b/digestive-functors.cabal
@@ -1,5 +1,5 @@
 Name:                digestive-functors
-Version:             0.0.2.0
+Version:             0.0.2.1
 Synopsis:            A general way to consume input using applicative functors
 Description:         Digestive functors is a library to generate and process
     HTML forms.  You can find an introduction here:
@@ -13,7 +13,7 @@
 Maintainer:          jaspervdj@gmail.com
 Category:            Web
 Build-type:          Simple
-Cabal-version:       >=1.2
+Cabal-version:       >=1.6
 
 
 Library
@@ -28,7 +28,7 @@
                        Text.Digestive.Cli,
                        Text.Digestive
   Build-depends:       base >= 4 && < 5,
-                       monads-fd >= 0.1,
+                       mtl >= 2.0.0.0 && < 3,
                        containers >= 0.3,
                        bytestring >= 0.9,
                        text >= 0.10
diff --git a/src/Text/Digestive/Forms.hs b/src/Text/Digestive/Forms.hs
--- a/src/Text/Digestive/Forms.hs
+++ b/src/Text/Digestive/Forms.hs
@@ -21,7 +21,7 @@
 import Text.Digestive.Result
 import Text.Digestive.Transform
 
--- | Class which all backends should implement. @a@ is here the type that is
+-- | Class which all backends should implement. @i@ is here the type that is
 -- used to represent a value uploaded by the client in the request
 --
 class FormInput i f | i -> f where