diff --git a/servant-foreign/servant-foreign.cabal b/servant-foreign/servant-foreign.cabal
index a89aeff9..93776a19 100644
--- a/servant-foreign/servant-foreign.cabal
+++ b/servant-foreign/servant-foreign.cabal
@@ -47,20 +47,21 @@ library
   if impl(ghc >= 8.0)
     ghc-options: -Wno-redundant-constraints
   include-dirs: include
-  default-extensions:  CPP
-                     , ConstraintKinds
+  default-extensions:  ConstraintKinds
+                     , CPP
                      , DataKinds
+                     , DeriveDataTypeable
                      , FlexibleContexts
                      , FlexibleInstances
                      , GeneralizedNewtypeDeriving
                      , MultiParamTypeClasses
+                     , OverloadedStrings
+                     , PolyKinds
                      , ScopedTypeVariables
                      , TemplateHaskell
                      , TypeFamilies
                      , TypeOperators
                      , UndecidableInstances
-                     , OverloadedStrings
-                     , PolyKinds
 
 
 test-suite spec
diff --git a/servant-foreign/src/Servant/Foreign/Internal.hs b/servant-foreign/src/Servant/Foreign/Internal.hs
index aa72b25f..8cde7d52 100644
--- a/servant-foreign/src/Servant/Foreign/Internal.hs
+++ b/servant-foreign/src/Servant/Foreign/Internal.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE CPP #-}
-{-# LANGUAGE DeriveDataTypeable #-}
 #if !MIN_VERSION_base(4,8,0)
 {-# LANGUAGE NullaryTypeClasses #-}
 #endif