diff --git a/library/Potoki/Core/Transform/ByteString.hs b/library/Potoki/Core/Transform/ByteString.hs
--- a/library/Potoki/Core/Transform/ByteString.hs
+++ b/library/Potoki/Core/Transform/ByteString.hs
@@ -13,7 +13,6 @@
 import qualified Data.ByteString.Builder as E
 import qualified Data.ByteString.Lazy as F
 import qualified Acquire.Acquire as M
-import qualified Control.Monad.Par as Par
 
 
 {-# INLINE builderChunks #-}
diff --git a/potoki-core.cabal b/potoki-core.cabal
--- a/potoki-core.cabal
+++ b/potoki-core.cabal
@@ -1,5 +1,5 @@
 name: potoki-core
-version: 2.3.0.1
+version: 2.3.0.2
 synopsis: Low-level components of "potoki"
 description:
   Provides everything required for building custom instances of