diff --git a/hw-excess.cabal b/hw-excess.cabal
--- a/hw-excess.cabal
+++ b/hw-excess.cabal
@@ -1,53 +1,67 @@
-name:                   hw-excess
-version:                0.2.0.0
-synopsis:               Excess
-description:            Please see README.md
-homepage:               http://github.com/haskell-works/hw-excess#readme
-license:                BSD3
-license-file:           LICENSE
-author:                 John Ky
-maintainer:             newhoggy@gmail.com
-copyright:              2016 John Ky
-category:               Data, Conduit
-build-type:             Simple
-extra-source-files:     README.md
-cabal-version:          >= 1.22
-
-library
-  hs-source-dirs:       src
-  exposed-modules:      HaskellWorks.Data.Excess
-                      , HaskellWorks.Data.Excess.Excess0
-                      , HaskellWorks.Data.Excess.Excess1
-                      , HaskellWorks.Data.Excess.MinMaxExcess0
-                      , HaskellWorks.Data.Excess.MinMaxExcess1
-                      , HaskellWorks.Data.Excess.Triplet
-  build-depends:        base                          >= 4          && < 5
-                      , hw-bits                       >= 0.4.0.0
-                      , hw-prim                       >= 0.4.0.0
-                      , hw-rankselect-base            >= 0.2.0.0
-                      , safe
-                      , storable-record
-                      , vector
+-- This file has been generated from package.yaml by hpack version 0.18.1.
+--
+-- see: https://github.com/sol/hpack
 
-  default-language:     Haskell2010
-  ghc-options:          -Wall -O2 -msse4.2
+name:           hw-excess
+version:        0.2.0.2
+synopsis:       Excess
+description:    Please see README.md
+category:       Data, Conduit
+homepage:       http://github.com/haskell-works/hw-excess#readme
+bug-reports:    https://github.com/haskell-works/hw-excess/issues
+author:         John Ky
+maintainer:     newhoggy@gmail.com
+copyright:      2016 John Ky
+license:        BSD3
+license-file:   LICENSE
+tested-with:    GHC == 8.4.2, GHC == 8.2.2, GHC == 8.0.2, GHC == 7.10.3
+build-type:     Simple
+cabal-version:  >= 1.10
 
-test-suite hw-excess-test
-  type:                 exitcode-stdio-1.0
-  hs-source-dirs:       test
-  main-is:              Spec.hs
-  other-modules:        HaskellWorks.Data.Excess.MinMaxExcess0Spec
-                      , HaskellWorks.Data.Excess.MinMaxExcess1Spec
-  build-depends:        base                          >= 4          && < 5
-                      , hspec
-                      , hw-bits                       >= 0.4.0.0
-                      , hw-prim                       >= 0.4.0.0
-                      , hw-excess
-                      , QuickCheck
-                      , vector
-  ghc-options:          -threaded -rtsopts -with-rtsopts=-N -Wall
-  default-language:     Haskell2010
+extra-source-files:
+    README.md
 
 source-repository head
-  type:     git
+  type: git
   location: https://github.com/haskell-works/hw-excess
+
+library
+  hs-source-dirs:
+      src
+  ghc-options: -Wall -O2 -msse4.2
+  build-depends:
+      base >=4.8 && <5
+    , hw-bits >=0.4.0.0 && < 0.8
+    , hw-prim >=0.4.0.0 && < 0.7
+    , vector >= 0.12 && < 0.13
+    , hw-rankselect-base >=0.2.0.0 && < 0.4
+    , safe >= 0.2 && < 0.4
+  exposed-modules:
+      HaskellWorks.Data.Excess
+      HaskellWorks.Data.Excess.Excess0
+      HaskellWorks.Data.Excess.Excess1
+      HaskellWorks.Data.Excess.MinMaxExcess0
+      HaskellWorks.Data.Excess.MinMaxExcess1
+      HaskellWorks.Data.Excess.Triplet
+  other-modules:
+      Paths_hw_excess
+  default-language: Haskell2010
+
+test-suite hw-excess-test
+  type: exitcode-stdio-1.0
+  main-is: Spec.hs
+  hs-source-dirs:
+      test
+  ghc-options: -Wall -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      base >=4.8 && <5
+    , hw-bits >=0.4.0.0 && < 0.8
+    , hw-prim >=0.4.0.0 && < 0.7
+    , vector >= 0.12 && < 0.13
+    , hspec >= 2.3 && < 2.6
+    , hw-excess
+    , QuickCheck >= 2.10 && < 2.12
+  other-modules:
+      HaskellWorks.Data.Excess.MinMaxExcess0Spec
+      HaskellWorks.Data.Excess.MinMaxExcess1Spec
+  default-language: Haskell2010
diff --git a/src/HaskellWorks/Data/Excess/Triplet.hs b/src/HaskellWorks/Data/Excess/Triplet.hs
--- a/src/HaskellWorks/Data/Excess/Triplet.hs
+++ b/src/HaskellWorks/Data/Excess/Triplet.hs
@@ -4,11 +4,10 @@
   ( Triplet(..)
   ) where
 
-import Control.Applicative (liftA3)
+import Control.Applicative (pure)
+import Foreign.Ptr         (castPtr)
 import Foreign.Storable    (Storable (..))
 
-import qualified Foreign.Storable.Record as Store
-
 data Triplet = Triplet
   { tripletMinExcess :: !Int
   , tripletAllExcess :: !Int
@@ -16,13 +15,15 @@
   } deriving (Eq, Show)
 
 instance Storable Triplet where
-  sizeOf    = Store.sizeOf storeTriple
-  alignment = Store.alignment storeTriple
-  peek      = Store.peek storeTriple
-  poke      = Store.poke storeTriple
+  sizeOf _    = sizeOf (0 :: Int) * 3
+  alignment _ = alignment (0 :: Int)
+  peek p      = do let q = castPtr p
+                   a <- peek q
+                   b <- peekElemOff q 1
+                   c <- peekElemOff q 2
+                   pure (Triplet a b c)
+  poke p t    = do let q = castPtr p
+                   poke q (tripletMinExcess t)
+                   pokeElemOff q 1 (tripletAllExcess t)
+                   pokeElemOff q 2 (tripletMaxExcess t)
 
-storeTriple :: Store.Dictionary Triplet
-storeTriple = Store.run $ liftA3 Triplet
-  (Store.element tripletMinExcess)
-  (Store.element tripletAllExcess)
-  (Store.element tripletMaxExcess)