diff --git a/flags-applicative.cabal b/flags-applicative.cabal
--- a/flags-applicative.cabal
+++ b/flags-applicative.cabal
@@ -1,5 +1,5 @@
 name: flags-applicative
-version: 0.1.0.0
+version: 0.1.0.1
 synopsis: Applicative flag parsing
 description: https://github.com/mtth/flags-applicative
 homepage: https://github.com/mtth/flags-applicative
@@ -18,11 +18,11 @@
   exposed-modules:
     Flags.Applicative
   build-depends:
-      base >= 4.8 && < 5
-    , casing >= 0.1.4
-    , containers >= 0.6
-    , mtl >= 2.2
-    , network >= 2.8
+      base >=4.9 && <5
+    , casing >=0.1.4
+    , containers >=0.6
+    , mtl >=2.2
+    , network >=2.8
     , text >= 1.2
   default-language: Haskell2010
   ghc-options: -Wall
diff --git a/src/Flags/Applicative.hs b/src/Flags/Applicative.hs
--- a/src/Flags/Applicative.hs
+++ b/src/Flags/Applicative.hs
@@ -2,7 +2,6 @@
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE RankNTypes #-}
 
 -- | This module implements a lightweight flags parser, inspired by @optparse-applicative@.
 --
@@ -15,12 +14,14 @@
 -- import Data.Text (Text)
 -- import Flags.Applicative
 --
+-- -- Custom flags for our example.
 -- data Flags = Flags
 --   { rootPath :: Text
 --   , logLevel :: Int
 --   , context :: Maybe Text
 --   } deriving Show
 --
+-- -- Returns a parser from CLI arguments to our custom flags.
 -- flagsParser :: FlagsParser Flags
 -- flagsParser = Flags
 --   \<$\> flag textVal "root" "path to the root"
@@ -29,7 +30,7 @@
 --
 -- main :: IO ()
 -- main = do
---   (flags, args) <- parseSystemFlagsOrDie optionsParser
+--   (flags, args) <- parseSystemFlagsOrDie flagsParser
 --   print flags
 -- @
 module Flags.Applicative (