diff --git a/CHANGES.md b/CHANGES.md
index 30e8d3d97..bc0edbcb0 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -11,6 +11,7 @@
 * Mask `stToIO` from default exports.
 * Export `NonEmpty` type and constructor for Base 4.9 only.
 * Export `Data.Semigroup` type and functions for Base 4.9 only.
+* Restrict exported symbols from ``async`` to set available in 2.0.
 
 0.1.9
 ====
diff --git a/protolude.cabal b/protolude.cabal
index d67ed6b96..42e3e23e5 100644
--- a/protolude.cabal
+++ b/protolude.cabal
@@ -7,7 +7,7 @@ license:             MIT
 license-file:        LICENSE
 author:              Stephen Diehl
 maintainer:          stephen.m.diehl@gmail.com
-copyright:           2016 Stephen Diehl
+copyright:           2016-2017 Stephen Diehl
 category:            Prelude
 build-type:          Simple
 cabal-version:       >=1.10
@@ -34,6 +34,9 @@ Source-Repository head
 library
   exposed-modules:     
     Protolude
+
+  other-modules:
+    Exceptions
     Unsafe
     Base
     Applicative
@@ -47,11 +50,8 @@ library
     Functor
     Semiring
     Bifunctor
-    Exceptions
     Panic
 
-  other-modules:
-
   default-extensions:
     NoImplicitPrelude
     OverloadedStrings
@@ -64,6 +64,7 @@ library
 
   build-depends:       
     base             >= 4.6  && <4.10,
+    array            >= 0.4  && <0.6,
     ghc-prim         >= 0.3  && <0.6,
     async            >= 2.0  && <2.2,
     deepseq          >= 1.3  && <1.5,
diff --git a/src/Exceptions.hs b/src/Exceptions.hs
index f8c0adbf7..801b2aafc 100644
--- a/src/Exceptions.hs
+++ b/src/Exceptions.hs
@@ -22,6 +22,7 @@ hush :: Alternative m => Either e a -> m a
 hush (Left _)  = empty
 hush (Right x) = pure x
 
+-- To suppress redundenet applicative constraint warning on GHC 8.0
 #if ( __GLASGOW_HASKELL__ >= 800 )
 note :: (MonadError e m) => e -> Maybe a -> m a
 note err = maybe (throwError err) pure
diff --git a/src/Functor.hs b/src/Functor.hs
index 7d0a31d9f..ebc35030d 100644
--- a/src/Functor.hs
+++ b/src/Functor.hs
@@ -12,7 +12,7 @@ module Functor (
 
 import Data.Function ((.))
 
-#if (__GLASGOW_HASKELL__ >= 710)
+#if MIN_VERSION_base(4,7,0)
 import Data.Functor (
     Functor(..)
   , ($>)
diff --git a/src/Monad.hs b/src/Monad.hs
index 1d9cdda03..139bacb74 100644
--- a/src/Monad.hs
+++ b/src/Monad.hs
@@ -42,12 +42,7 @@ module Monad (
 
 import Base (seq)
 import Data.List (concat)
-
-#if (__GLASGOW_HASKELL__ >= 710)
-import Control.Monad hiding ((<$!>))
-#else
 import Control.Monad
-#endif
 
 concatMapM :: Monad m => (a -> m [b]) -> [a] -> m [b]
 concatMapM f xs = liftM concat (mapM f xs)
@@ -64,9 +59,11 @@ liftM2' f a b = do
   z `seq` return z
 {-# INLINE liftM2' #-}
 
+#if !MIN_VERSION_base(4,8,0)
 (<$!>) :: Monad m => (a -> b) -> m a -> m b
 f <$!> m = do
   x <- m
   let z = f x
   z `seq` return z
 {-# INLINE (<$!>) #-}
+#endif