diff --git a/Util.hs b/Util.hs
--- a/Util.hs
+++ b/Util.hs
@@ -9,7 +9,7 @@
 import Data.Functor.Classes
 import Data.Maybe
 import Data.Semigroup
-import Data.Monoid
+import Data.Monoid (Monoid (..))
 import Numeric.Natural
 
 import Prelude (Enum (..), Bounded, Eq, Ord, Read, Show, Traversable (..))
diff --git a/util.cabal b/util.cabal
--- a/util.cabal
+++ b/util.cabal
@@ -1,5 +1,5 @@
 name:                util
-version:             0.1.2.0
+version:             0.1.2.1
 synopsis:            Utilities
 -- description:         
 license:             BSD3