diff --git a/react.cabal b/react.cabal
index 4028541..6870884 100644
--- a/react.cabal
+++ b/react.cabal
@@ -44,3 +44,8 @@ library
     build-depends: jsaddle-warp
 
   default-language: Haskell2010
+  default-extensions:
+    FlexibleInstances
+    GeneralizedNewtypeDeriving
+    LambdaCase
+    OverloadedStrings
diff --git a/src/React/Component.hs b/src/React/Component.hs
index aea92e1..b21821b 100644
--- a/src/React/Component.hs
+++ b/src/React/Component.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module React.Component where
 
 import Control.Monad.Except
diff --git a/src/React/Element.hs b/src/React/Element.hs
index c8f09af..fdce34f 100644
--- a/src/React/Element.hs
+++ b/src/React/Element.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE OverloadedStrings #-}
 module React.Element where
 
 import Control.Monad.Except
diff --git a/src/React/Export.hs b/src/React/Export.hs
index 15723eb..50c1a91 100644
--- a/src/React/Export.hs
+++ b/src/React/Export.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE CPP #-}
-{-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TemplateHaskell #-}
 module React.Export where
 
diff --git a/src/React/Hook.hs b/src/React/Hook.hs
index c59a1de..8a5794d 100644
--- a/src/React/Hook.hs
+++ b/src/React/Hook.hs
@@ -1,5 +1,3 @@
-{-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module React.Hook where
 
 import Prelude hiding ((!!))
diff --git a/src/React/JSaddle.hs b/src/React/JSaddle.hs
index 157107e..8645443 100644
--- a/src/React/JSaddle.hs
+++ b/src/React/JSaddle.hs
@@ -1,7 +1,4 @@
 {-# LANGUAGE CPP #-}
-{-# LANGUAGE FlexibleInstances #-}
-{-# LANGUAGE GeneralizedNewtypeDeriving #-}
-{-# LANGUAGE OverloadedStrings #-}
 {-# OPTIONS_GHC -Wno-orphans #-}
 -- | Everything in this module belongs in JSaddle, GHCJS-DOM, or similar
 module React.JSaddle where
diff --git a/src/React/Types.hs b/src/React/Types.hs
index d66e8fe..b9f68ab 100644
--- a/src/React/Types.hs
+++ b/src/React/Types.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE CPP #-}
-{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module React.Types where
 
 import Control.Monad.Reader