diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,10 @@
 # Revision history for st2
 
+## 0.1.0.2 -- 2018-11-02
+
+* Fix build on GHC-8.6, which requires Control.Monad.ST2 to have
+  -XPolyKinds enabled in order to compile.
+
 ## 0.1.0.1 -- 2018-11-02
 
 * Fix internal bug that could cause semantic differences under optimisations,
diff --git a/src/Control/Monad/ST2.hs b/src/Control/Monad/ST2.hs
--- a/src/Control/Monad/ST2.hs
+++ b/src/Control/Monad/ST2.hs
@@ -4,6 +4,7 @@
 {-# LANGUAGE KindSignatures       #-}
 {-# LANGUAGE MagicHash            #-}
 {-# LANGUAGE NoImplicitPrelude    #-}
+{-# LANGUAGE PolyKinds            #-}
 {-# LANGUAGE Rank2Types           #-}
 {-# LANGUAGE ScopedTypeVariables  #-}
 {-# LANGUAGE TypeFamilies         #-}
diff --git a/st2.cabal b/st2.cabal
--- a/st2.cabal
+++ b/st2.cabal
@@ -1,6 +1,10 @@
-name:                st2
-version:             0.1.0.1
-synopsis:            shared heap regions between local mutable state threads
+cabal-version: 2.2
+name:
+  st2
+version:
+  0.1.0.2
+synopsis:
+  shared heap regions between local mutable state threads
 description:
   This library implements the ST2 monad, a type using GDP (ghosts of departed proofs)
   to define shared regions of memory between local mutable state threads. This allows
@@ -15,19 +19,34 @@
   private, and the other shared. A second sub-computation has unconstrained access to the
   shared cell. Yet even though the private reference is also in scope during the second
   sub-computation, any attempts to access it there will fail to compile.
-homepage:            https://github.com/chessai/st2.git
-license:             BSD3
-license-file:        LICENSE
-author:              chessai
-maintainer:          chessai1996@gmail.com
-copyright:           copyright (c) 2018 chessai, copyright (c) 2018 Matt Noonan
-category:            Data
-build-type:          Simple
-extra-source-files:  ChangeLog.md
-cabal-version:       >=1.10
+homepage:
+  https://github.com/chessai/st2.git
+license:
+  BSD-3-Clause
+license-file:
+  LICENSE
+author:
+  chessai
+maintainer:
+  chessai1996@gmail.com
+copyright:
+  copyright (c) 2018 chessai, copyright (c) 2018 Matt Noonan
+category:
+  Data
+build-type:
+  Simple
+extra-source-files:
+  ChangeLog.md
 
 library
-  exposed-modules:     Control.Monad.ST2
-  build-depends:       base >= 4.9 && < 4.13, gdp, ghc-prim, primitive
-  hs-source-dirs:      src
-  default-language:    Haskell2010
+  exposed-modules:
+    Control.Monad.ST2
+  build-depends:
+      base >= 4.9 && < 4.13
+    , gdp >= 0.0.0.1 && < 0.1.0.0
+    , ghc-prim
+    , primitive >= 0.6.4.0
+  hs-source-dirs:
+    src
+  default-language:
+    Haskell2010