diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+1.1.2
+
+* Conditionally disable `Polykinds` to support older versions of GHC
+
 1.1.1
 
 * Increase upper bound on `transformers-compat`
diff --git a/mmorph.cabal b/mmorph.cabal
--- a/mmorph.cabal
+++ b/mmorph.cabal
@@ -1,5 +1,5 @@
 Name: mmorph
-Version: 1.1.1
+Version: 1.1.2
 Cabal-Version: >= 1.8.0.2
 Build-Type: Simple
 License: BSD3
diff --git a/src/Control/Monad/Morph.hs b/src/Control/Monad/Morph.hs
--- a/src/Control/Monad/Morph.hs
+++ b/src/Control/Monad/Morph.hs
@@ -1,4 +1,8 @@
-{-# LANGUAGE CPP, RankNTypes, PolyKinds #-}
+{-# LANGUAGE CPP, RankNTypes #-}
+
+#if __GLASGOW_HASKELL__ >= 706
+{-# LANGUAGE PolyKinds #-}
+#endif
 
 {-| A monad morphism is a natural transformation: