diff --git a/bytestring-tree-builder.cabal b/bytestring-tree-builder.cabal
--- a/bytestring-tree-builder.cabal
+++ b/bytestring-tree-builder.cabal
@@ -1,5 +1,5 @@
 name: bytestring-tree-builder
-version: 0.2.7.8
+version: 0.2.7.9
 category: ByteString
 synopsis: A very efficient ByteString builder implementation based on the binary tree
 description:
diff --git a/library/ByteString/TreeBuilder/Prelude.hs b/library/ByteString/TreeBuilder/Prelude.hs
--- a/library/ByteString/TreeBuilder/Prelude.hs
+++ b/library/ByteString/TreeBuilder/Prelude.hs
@@ -30,7 +30,6 @@
 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