diff --git a/Data/Sized/Internal.hs b/Data/Sized/Internal.hs
--- a/Data/Sized/Internal.hs
+++ b/Data/Sized/Internal.hs
@@ -76,13 +76,13 @@
   otraverse f = fmap Sized . otraverse f . runSized
   omapM f = fmap Sized . omapM f. runSized
 
--- | Since 0.2.0.0
-instance {-# OVERLAPS #-} SV.Storable a => MonoTraversable (Sized SV.Vector n a) where
+-- | Since 0.6.0.0
+instance {-# OVERLAPPING #-} SV.Storable a => MonoTraversable (Sized SV.Vector n a) where
   otraverse f = fmap Sized . otraverse f . runSized
   omapM f = fmap Sized . omapM f . runSized
 
--- | Since 0.2.0.0
-instance {-# OVERLAPS #-} UV.Unbox a => MonoTraversable (Sized UV.Vector n a) where
+-- | Since 0.6.0.0
+instance {-# OVERLAPPING #-} UV.Unbox a => MonoTraversable (Sized UV.Vector n a) where
   otraverse f = fmap Sized . otraverse f . runSized
   omapM f = fmap Sized . omapM f . runSized
 
diff --git a/sized.cabal b/sized.cabal
--- a/sized.cabal
+++ b/sized.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                sized
-version:             0.5.0.0
+version:             0.6.0.0
 synopsis:            Sized sequence data-types
 description:         A wrapper to make length-parametrized data-type from ListLike data-types.
 license:             BSD3