diff --git a/library/THLego/Prelude.hs b/library/THLego/Prelude.hs
--- a/library/THLego/Prelude.hs
+++ b/library/THLego/Prelude.hs
@@ -31,7 +31,6 @@
 import Data.Function as Exports hiding (id, (.))
 import Data.Functor as Exports
 import Data.Functor.Compose as Exports
-import Data.Functor.Contravariant as Exports
 import Data.Int as Exports
 import Data.IORef as Exports
 import Data.Ix as Exports
diff --git a/th-lego.cabal b/th-lego.cabal
--- a/th-lego.cabal
+++ b/th-lego.cabal
@@ -1,5 +1,5 @@
 name: th-lego
-version: 0.1.0.3
+version: 0.1.0.4
 synopsis: Template Haskell construction utilities
 description:
   A collection of templates for the typical patterns appearing
@@ -24,7 +24,7 @@
 
 library
   hs-source-dirs: library
-  default-extensions: BangPatterns, BlockArguments, ConstraintKinds, DataKinds, DefaultSignatures, DeriveDataTypeable, DeriveFoldable, DeriveFunctor, DeriveGeneric, DeriveTraversable, DerivingVia, EmptyDataDecls, FlexibleContexts, FlexibleInstances, FunctionalDependencies, GADTs, GeneralizedNewtypeDeriving, InstanceSigs, LambdaCase, LiberalTypeSynonyms, MagicHash, MultiParamTypeClasses, MultiWayIf, NoImplicitPrelude, NoMonomorphismRestriction, OverloadedStrings, PatternGuards, ParallelListComp, QuasiQuotes, RankNTypes, RecordWildCards, ScopedTypeVariables, StandaloneDeriving, StrictData, TemplateHaskell, TupleSections, TypeApplications, TypeFamilies, TypeOperators, UnboxedTuples
+  default-extensions: BangPatterns, ConstraintKinds, DataKinds, DefaultSignatures, DeriveDataTypeable, DeriveFoldable, DeriveFunctor, DeriveGeneric, DeriveTraversable, EmptyDataDecls, FlexibleContexts, FlexibleInstances, FunctionalDependencies, GADTs, GeneralizedNewtypeDeriving, InstanceSigs, LambdaCase, LiberalTypeSynonyms, MagicHash, MultiParamTypeClasses, MultiWayIf, NoImplicitPrelude, NoMonomorphismRestriction, OverloadedStrings, PatternGuards, ParallelListComp, QuasiQuotes, RankNTypes, RecordWildCards, ScopedTypeVariables, StandaloneDeriving, StrictData, TemplateHaskell, TupleSections, TypeApplications, TypeFamilies, TypeOperators, UnboxedTuples
   default-language: Haskell2010
   exposed-modules:
     THLego.Helpers
@@ -33,7 +33,7 @@
   other-modules:
     THLego.Prelude
   build-depends:
-    base >=4.9 && <5,
+    base >=4.10 && <5,
     template-haskell >=2.8 && <3,
     template-haskell-compat-v0208 >=0.1.5 && <0.2,
     text >=1 && <2