diff --git a/indexed.cabal b/indexed.cabal
--- a/indexed.cabal
+++ b/indexed.cabal
@@ -1,5 +1,5 @@
 Name:                indexed
-Version:             0.1.1
+Version:             0.1.2
 Synopsis:            Haskell98 indexed functors, monads, comonads
 Description:         Haskell98 indexed functors, monads, comonads
 License:             BSD3
@@ -13,7 +13,7 @@
     Copyright (C) 2007 Iavor Diatchki
 Category:            Control
 Build-type:          Simple
-Cabal-version:       >=1.6
+Cabal-version:       >=1.10
 homepage:            https://github.com/reinerp/indexed
 bug-reports:         https://github.com/reinerp/indexed/issues
 
@@ -28,6 +28,9 @@
     Control.Monad.Indexed.Fix, 
     Control.Monad.Indexed.Trans
     Control.Comonad.Indexed
+ default-language: Haskell98
+ if impl(ghc >= 7.5)
+   default-extensions: PolyKinds
  Build-depends:
     base < 5
  ghc-options: