diff --git a/Setup.hs b/Setup.hs
deleted file mode 100644
--- a/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/src/Control/Monad/Trans/Either/Exit.hs b/src/Control/Monad/Trans/Either/Exit.hs
--- a/src/Control/Monad/Trans/Either/Exit.hs
+++ b/src/Control/Monad/Trans/Either/Exit.hs
@@ -3,17 +3,11 @@
   , orDieWithCode
   ) where
 
-import           Control.Applicative (pure)
-import           Control.Monad ((>>=), (>>))
-
-import           Data.Either (either)
-import           Data.Function ((.))
-import           Data.Int (Int)
 import           Data.Text (Text)
 import qualified Data.Text as T
 
 import           System.Exit (ExitCode(..), exitWith)
-import           System.IO (IO, stderr, hPutStrLn)
+import           System.IO (stderr, hPutStrLn)
 
 import           Control.Monad.Trans.Either
 
diff --git a/transformers-either.cabal b/transformers-either.cabal
--- a/transformers-either.cabal
+++ b/transformers-either.cabal
@@ -1,15 +1,21 @@
+cabal-version:         3.0
 name:                  transformers-either
-version:               0.1.1
-license:               BSD3
+version:               0.1.2
+license:               BSD-3-Clause
 license-file:          LICENSE
 author:                Tim McGilchrist <timmcgil@gmail.com>
 maintainer:            Tim McGilchrist <timmcgil@gmail.com>
 copyright:             (c) 2017 Tim McGilchrist
 synopsis:              An Either monad transformer
 category:              System
-cabal-version:         >= 1.8
 build-type:            Simple
-tested-with:           GHC == 8.4.2, GHC == 8.2.2, GHC == 8.0.2, GHC == 7.10.3
+tested-with:           GHC == 8.10.5
+                     , GHC == 8.8.4
+                     , GHC == 8.6.5
+                     , GHC == 8.4.4
+                     , GHC == 8.2.2
+                     , GHC == 8.0.2
+
 description:
             Drop in alternative to ExceptT.
 
@@ -31,6 +37,7 @@
   ghc-options:
                        -Wall
 
+  default-language:   Haskell98
   hs-source-dirs:
                        src