diff --git a/app/App/Commands/Build.hs b/app/App/Commands/Build.hs
--- a/app/App/Commands/Build.hs
+++ b/app/App/Commands/Build.hs
@@ -9,32 +9,32 @@
 import Control.Lens
 import Control.Monad
 import Data.Generics.Product.Any
-import Data.List
 import HaskellWorks.Data.FromForeignRegion
 import Options.Applicative
 import System.Directory
 
 import qualified App.Commands.Options.Type                            as Z
+import qualified Data.List                                            as L
 import qualified HaskellWorks.Data.RankSelect.CsPoppy                 as CS
 import qualified HaskellWorks.Data.RankSelect.CsPoppy.Internal.Alpha1 as A1
 import qualified HaskellWorks.Data.RankSelect.Poppy512                as P512
 
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
-{-# ANN module ("HLint: ignore Redundant do"        :: String) #-}
-{-# ANN module ("HLint: ignore Redundant return"    :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
+{- HLINT ignore "Redundant bracket"   -}
 
 runBuild :: Z.BuildOptions -> IO ()
 runBuild opts = case opts ^. the @"indexType" of
   Z.CsPoppy  -> do
     entries <- getDirectoryContents "data"
-    let files = ("data/" ++) <$> (".ib" `isSuffixOf`) `filter` entries
+    let files = ("data/" ++) <$> (".ib" `L.isSuffixOf`) `filter` entries
     forM_ files $ \file -> do
       putStrLn $ "Loading cspoppy for " <> file
       CS.CsPoppy !_ !_ (A1.CsPoppyIndex !_ !_) <- mmapFromForeignRegion file
       return ()
   Z.Poppy512 -> do
     entries <- getDirectoryContents "data"
-    let files = ("data/" ++) <$> (".ib" `isSuffixOf`) `filter` entries
+    let files = ("data/" ++) <$> (".ib" `L.isSuffixOf`) `filter` entries
     forM_ files $ \file -> do
       putStrLn $ "Loading cspoppy for " <> file
       P512.Poppy512 !_ !_ <- mmapFromForeignRegion file
diff --git a/app/App/Commands/SelectAll.hs b/app/App/Commands/SelectAll.hs
--- a/app/App/Commands/SelectAll.hs
+++ b/app/App/Commands/SelectAll.hs
@@ -10,7 +10,6 @@
 import Control.Lens
 import Control.Monad
 import Data.Generics.Product.Any
-import Data.List
 import HaskellWorks.Data.Bits.PopCount.PopCount1
 import HaskellWorks.Data.FromForeignRegion
 import HaskellWorks.Data.RankSelect.Base.Select1
@@ -20,16 +19,17 @@
 import System.Directory
 
 import qualified App.Commands.Options.Type as Z
+import qualified Data.List                 as L
 
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
-{-# ANN module ("HLint: ignore Redundant do"        :: String) #-}
-{-# ANN module ("HLint: ignore Redundant return"    :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
+{- HLINT ignore "Redundant bracket"   -}
 
 runSelectAll :: Z.SelectAllOptions -> IO ()
 runSelectAll opts = case opts ^. the @"indexType" of
   Z.CsPoppy -> do
     entries <- getDirectoryContents "data"
-    let files = ("data/" ++) <$> (".ib" `isSuffixOf`) `filter` entries
+    let files = ("data/" ++) <$> (".ib" `L.isSuffixOf`) `filter` entries
     forM_ files $ \file -> do
       putStrLn $ "Loading cspoppy for " <> file
       v :: CsPoppy <- mmapFromForeignRegion file
@@ -39,7 +39,7 @@
       return ()
   Z.Poppy512 -> do
     entries <- getDirectoryContents "data"
-    let files = ("data/" ++) <$> (".ib" `isSuffixOf`) `filter` entries
+    let files = ("data/" ++) <$> (".ib" `L.isSuffixOf`) `filter` entries
     forM_ files $ \file -> do
       putStrLn $ "Loading cspoppy for " <> file
       v :: Poppy512 <- mmapFromForeignRegion file
diff --git a/app/App/Commands/UnitTest.hs b/app/App/Commands/UnitTest.hs
--- a/app/App/Commands/UnitTest.hs
+++ b/app/App/Commands/UnitTest.hs
@@ -21,8 +21,8 @@
 import qualified HaskellWorks.Data.FromForeignRegion as IO
 import qualified System.IO                           as IO
 
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
-{-# ANN module ("HLint: ignore Redundant do"        :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
 
 runUnitTest :: Z.UnitTestOptions -> IO ()
 runUnitTest opts = case opts ^. the @"name" of
diff --git a/app/App/Commands/Validate.hs b/app/App/Commands/Validate.hs
--- a/app/App/Commands/Validate.hs
+++ b/app/App/Commands/Validate.hs
@@ -24,9 +24,9 @@
 import qualified HaskellWorks.Data.RankSelect.CsPoppy as CS
 import qualified System.IO                            as IO
 
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
-{-# ANN module ("HLint: ignore Redundant do"        :: String) #-}
-{-# ANN module ("HLint: ignore Redundant return"    :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
+{- HLINT ignore "Redundant bracket"   -}
 
 runValidate :: Z.ValidateOptions -> IO ()
 runValidate opts = case opts ^. the @"indexType" of
diff --git a/app/Main.hs b/app/Main.hs
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -5,7 +5,6 @@
 
 import App.Commands
 import Control.Monad
-import Data.List
 import HaskellWorks.Data.Bits.PopCount.PopCount1
 import HaskellWorks.Data.FromForeignRegion
 import HaskellWorks.Data.RankSelect.Base.Select1
@@ -14,13 +13,15 @@
 import Options.Applicative
 import System.Directory
 
-{-# ANN module ("HLint: ignore Redundant do" :: String) #-}
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
+import qualified Data.List as L
 
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
+
 runPoppy512SelectAll :: IO ()
 runPoppy512SelectAll = do
   entries <- getDirectoryContents "data"
-  let files = ("data/" ++) <$> (".ib" `isSuffixOf`) `filter` entries
+  let files = ("data/" ++) <$> (".ib" `L.isSuffixOf`) `filter` entries
   forM_ files $ \file -> do
     putStrLn $ "Loading cspoppy for " <> file
     v :: Poppy512 <- mmapFromForeignRegion file
@@ -32,7 +33,7 @@
 runCsPoppySelectAll :: IO ()
 runCsPoppySelectAll = do
   entries <- getDirectoryContents "data"
-  let files = ("data/" ++) <$> (".ib" `isSuffixOf`) `filter` entries
+  let files = ("data/" ++) <$> (".ib" `L.isSuffixOf`) `filter` entries
   forM_ files $ \file -> do
     putStrLn $ "Loading cspoppy for " <> file
     v :: CsPoppy <- mmapFromForeignRegion file
diff --git a/bench/Main.hs b/bench/Main.hs
--- a/bench/Main.hs
+++ b/bench/Main.hs
@@ -25,8 +25,8 @@
 import qualified HaskellWorks.Data.RankSelect.CsPoppy  as CS
 import qualified HaskellWorks.Data.RankSelect.Poppy512 as P512
 
-{-# ANN module ("HLint: ignore Redundant do" :: String) #-}
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
 
 selectStep :: Count
 selectStep = 1000
diff --git a/hw-rankselect.cabal b/hw-rankselect.cabal
--- a/hw-rankselect.cabal
+++ b/hw-rankselect.cabal
@@ -1,7 +1,7 @@
 cabal-version:  2.2
 
 name:                   hw-rankselect
-version:                0.13.4.0
+version:                0.13.4.1
 synopsis:               Rank-select
 description:            Please see README.md
 category:               Data, Bit, Succinct Data Structures, Data Structures
@@ -9,10 +9,10 @@
 bug-reports:            https://github.com/haskell-works/hw-rankselect/issues
 author:                 John Ky
 maintainer:             newhoggy@gmail.com
-copyright:              2016-2020 John Ky
+copyright:              2016-2021 John Ky
 license:                BSD-3-Clause
 license-file:           LICENSE
-tested-with:            GHC == 8.10.1, GHC == 8.8.3, GHC == 8.6.5, GHC == 8.4.4
+tested-with:            GHC == 9.2.2, GHC == 9.0.2, GHC == 8.10.7, GHC == 8.8.4, GHC == 8.6.5
 build-type:             Simple
 extra-source-files:     README.md
                         data/README.md
@@ -30,29 +30,29 @@
 common base                       { build-depends: base                       >= 4.11       && < 5      }
 
 common QuickCheck                 { build-depends: QuickCheck                 >= 2.10       && < 2.15   }
-common bytestring                 { build-depends: bytestring                 >= 0.10       && < 0.11   }
+common bytestring                 { build-depends: bytestring                 >= 0.10       && < 0.12   }
 common conduit                    { build-depends: conduit                    >= 1.2        && < 1.4    }
 common criterion                  { build-depends: criterion                  >= 1.1        && < 1.6    }
 common deepseq                    { build-depends: deepseq                    >= 1.4        && < 1.5    }
-common directory                  { build-depends: directory                  >= 1.2        && < 1.5    }
-common doctest                    { build-depends: doctest                    >= 0.16.2     && < 0.17   }
+common directory                  { build-depends: directory                  >= 1.2        && < 1.4    }
+common doctest                    { build-depends: doctest                    >= 0.16.2     && < 0.21   }
 common doctest-discover           { build-depends: doctest-discover           >= 0.2        && < 0.3    }
-common generic-lens               { build-depends: generic-lens               >= 1.2.0.1    && < 2.1    }
-common hedgehog                   { build-depends: hedgehog                   >= 1.0        && < 1.1    }
+common generic-lens               { build-depends: generic-lens               >= 1.2.0.1    && < 2.3    }
+common hedgehog                   { build-depends: hedgehog                   >= 1.0        && < 1.2    }
 common hspec                      { build-depends: hspec                      >= 2.4        && < 3      }
-common hw-balancedparens          { build-depends: hw-balancedparens          >= 0.2.2.0    && < 0.4    }
+common hw-balancedparens          { build-depends: hw-balancedparens          >= 0.2.2.0    && < 0.5    }
 common hw-bits                    { build-depends: hw-bits                    >= 0.4.0.0    && < 0.8    }
 common hw-fingertree              { build-depends: hw-fingertree              >= 0.1.1.0    && < 1.2    }
 common hw-hedgehog                { build-depends: hw-hedgehog                >= 0.1.0.1    && < 0.2    }
 common hw-hspec-hedgehog          { build-depends: hw-hspec-hedgehog          >= 0.1        && < 0.2    }
 common hw-prim                    { build-depends: hw-prim                    >= 0.6.2.23   && < 0.7    }
 common hw-rankselect-base         { build-depends: hw-rankselect-base         >= 0.2.0.0    && < 0.4    }
-common lens                       { build-depends: lens                       >= 4          && < 5      }
+common lens                       { build-depends: lens                       >= 4          && < 6      }
 common mmap                       { build-depends: mmap                       >= 0.5        && < 0.6    }
 common mtl                        { build-depends: mtl                        >= 2.2        && < 2.3    }
-common optparse-applicative       { build-depends: optparse-applicative       >= 0.11       && < 0.16   }
+common optparse-applicative       { build-depends: optparse-applicative       >= 0.11       && < 0.18   }
 common resourcet                  { build-depends: resourcet                  >= 1.1        && < 1.3    }
-common transformers               { build-depends: transformers               >= 0.4        && < 0.6    }
+common transformers               { build-depends: transformers               >= 0.4        && < 0.7    }
 common vector                     { build-depends: vector                     >= 0.12       && < 0.13   }
 
 common config
@@ -188,7 +188,7 @@
                       , doctest-discover
                       , hw-rankselect
   type:                 exitcode-stdio-1.0
-  ghc-options:          -threaded
+  ghc-options:          -threaded -rtsopts -with-rtsopts=-N
   main-is:              DoctestDriver.hs
   HS-Source-Dirs:       doctest
   build-tool-depends:   doctest-discover:doctest-discover
diff --git a/test/HaskellWorks/Data/RankSelect/BasicGen.hs b/test/HaskellWorks/Data/RankSelect/BasicGen.hs
--- a/test/HaskellWorks/Data/RankSelect/BasicGen.hs
+++ b/test/HaskellWorks/Data/RankSelect/BasicGen.hs
@@ -19,8 +19,8 @@
 import Hedgehog
 import Test.Hspec
 
-{-# ANN module ("HLint: ignore Redundant do"        :: String) #-}
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
 
 genRank0UpTo8Spec :: forall s. (Typeable s, BitRead s, Rank0 s, Show s) => s -> Spec
 genRank0UpTo8Spec _ = describe ("Generically up to 8 bits for " ++ show (typeOf (undefined :: s))) $ do
diff --git a/test/HaskellWorks/Data/RankSelect/BinarySearchSpec.hs b/test/HaskellWorks/Data/RankSelect/BinarySearchSpec.hs
--- a/test/HaskellWorks/Data/RankSelect/BinarySearchSpec.hs
+++ b/test/HaskellWorks/Data/RankSelect/BinarySearchSpec.hs
@@ -13,8 +13,8 @@
 
 import qualified Data.Vector.Storable as DVS
 
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
-{-# ANN module ("HLint: ignore Redundant do"        :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
 
 spec :: Spec
 spec = describe "HaskellWorks.Data.RankSelect.BinarySearchSpec" $ do
diff --git a/test/HaskellWorks/Data/RankSelect/BitSeqSpec.hs b/test/HaskellWorks/Data/RankSelect/BitSeqSpec.hs
--- a/test/HaskellWorks/Data/RankSelect/BitSeqSpec.hs
+++ b/test/HaskellWorks/Data/RankSelect/BitSeqSpec.hs
@@ -18,8 +18,8 @@
 import qualified Hedgehog.Gen                               as G
 import qualified Hedgehog.Range                             as R
 
-{-# ANN module ("HLint: ignore Redundant do"        :: String) #-}
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
 
 spec :: Spec
 spec = describe "HaskellWorks.Data.RankSelect.Internal.BitSeqSpec" $ do
diff --git a/test/HaskellWorks/Data/RankSelect/CsPoppy/InternalSpec.hs b/test/HaskellWorks/Data/RankSelect/CsPoppy/InternalSpec.hs
--- a/test/HaskellWorks/Data/RankSelect/CsPoppy/InternalSpec.hs
+++ b/test/HaskellWorks/Data/RankSelect/CsPoppy/InternalSpec.hs
@@ -16,8 +16,8 @@
 import qualified Hedgehog.Gen         as G
 import qualified Hedgehog.Range       as R
 
-{-# ANN module ("HLint: ignore Redundant do"        :: String) #-}
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
 
 makeCsPoppyBlocksRef :: DVS.Vector Word64 -> DVS.Vector Word64
 makeCsPoppyBlocksRef v = DVS.generate (((DVS.length v + 8 - 1) `div` 8) + 1) genBlocks
diff --git a/test/HaskellWorks/Data/RankSelect/CsPoppySpec.hs b/test/HaskellWorks/Data/RankSelect/CsPoppySpec.hs
--- a/test/HaskellWorks/Data/RankSelect/CsPoppySpec.hs
+++ b/test/HaskellWorks/Data/RankSelect/CsPoppySpec.hs
@@ -41,8 +41,8 @@
 import qualified Hedgehog.Gen                                         as G
 import qualified Hedgehog.Range                                       as R
 
-{-# ANN module ("HLint: ignore Redundant do" :: String) #-}
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
 
 newtype ShowVector a = ShowVector a deriving (Eq, BitShow)
 
diff --git a/test/HaskellWorks/Data/RankSelect/InternalSpec.hs b/test/HaskellWorks/Data/RankSelect/InternalSpec.hs
--- a/test/HaskellWorks/Data/RankSelect/InternalSpec.hs
+++ b/test/HaskellWorks/Data/RankSelect/InternalSpec.hs
@@ -17,8 +17,8 @@
 import qualified Hedgehog.Gen   as G
 import qualified Hedgehog.Range as R
 
-{-# ANN module ("HLint: ignore Redundant do" :: String) #-}
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
 
 spec :: Spec
 spec = describe "HaskellWorks.Data.RankSelect.InternalSpec" $ do
diff --git a/test/HaskellWorks/Data/RankSelect/Poppy512Spec.hs b/test/HaskellWorks/Data/RankSelect/Poppy512Spec.hs
--- a/test/HaskellWorks/Data/RankSelect/Poppy512Spec.hs
+++ b/test/HaskellWorks/Data/RankSelect/Poppy512Spec.hs
@@ -27,8 +27,8 @@
 import qualified Hedgehog.Gen                     as G
 import qualified Hedgehog.Range                   as R
 
-{-# ANN module ("HLint: ignore Redundant do" :: String) #-}
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
+{- HLINT ignore "Redundant do"        -}
+{- HLINT ignore "Reduce duplication"  -}
 
 spec :: Spec
 spec = describe "HaskellWorks.Data.RankSelect.Poppy512.Rank1Spec" $ do
diff --git a/test/HaskellWorks/Data/RankSelect/SimpleSpec.hs b/test/HaskellWorks/Data/RankSelect/SimpleSpec.hs
--- a/test/HaskellWorks/Data/RankSelect/SimpleSpec.hs
+++ b/test/HaskellWorks/Data/RankSelect/SimpleSpec.hs
@@ -16,7 +16,7 @@
 import qualified Hedgehog.Gen                     as G
 import qualified Hedgehog.Range                   as R
 
-{-# ANN module ("HLint: ignore Redundant do" :: String) #-}
+{- HLINT ignore "Redundant do"        -}
 
 spec :: Spec
 spec = describe "HaskellWorks.Data.SuccinctSpec" $ do
diff --git a/test/HaskellWorks/Data/RankSelect/ValidateSpec.hs b/test/HaskellWorks/Data/RankSelect/ValidateSpec.hs
--- a/test/HaskellWorks/Data/RankSelect/ValidateSpec.hs
+++ b/test/HaskellWorks/Data/RankSelect/ValidateSpec.hs
@@ -24,7 +24,7 @@
 import qualified Hedgehog.Range            as R
 import qualified System.Directory          as IO
 
-{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
+{- HLINT ignore "Reduce duplication"  -}
 
 entries :: [FilePath]
 entries = mfilter (".idx" `isSuffixOf`) <$> unsafePerformIO $ IO.getDirectoryContents "data"
