diff --git a/hw-eliasfano.cabal b/hw-eliasfano.cabal
--- a/hw-eliasfano.cabal
+++ b/hw-eliasfano.cabal
@@ -1,5 +1,5 @@
 name:                   hw-eliasfano
-version:                0.1.0.0
+version:                0.1.0.1
 synopsis:               Elias-Fano
 description:            Please see README.md
 homepage:               http://github.com/haskell-works/hw-eliasfano#readme
@@ -20,6 +20,7 @@
   build-depends:        base                          >= 4          && < 5
                       , hw-bits                       >= 0.4.0.0
                       , hw-int                        >= 0.0.0.1
+                      , hw-packed-vector              >= 0.0.0.1
                       , hw-prim                       >= 0.4.0.0
                       , safe
                       , vector
diff --git a/src/HaskellWorks/Data/EliasFano64.hs b/src/HaskellWorks/Data/EliasFano64.hs
--- a/src/HaskellWorks/Data/EliasFano64.hs
+++ b/src/HaskellWorks/Data/EliasFano64.hs
@@ -6,13 +6,13 @@
   , ToEliasFano64(..)
   ) where
 
-import qualified Data.Vector.Storable                 as DVS
+import qualified Data.Vector.Storable                   as DVS
 import           Data.Word
 import           HaskellWorks.Data.AtIndex
 import           HaskellWorks.Data.Bits.BitWise
 import           HaskellWorks.Data.Bits.Log2
-import           HaskellWorks.Data.Bits.PackedVector  as PV
 import           HaskellWorks.Data.EliasFano64.Internal
+import           HaskellWorks.Data.PackedVector         as PV
 import           HaskellWorks.Data.Positioning
 import           HaskellWorks.Data.Take
 import           Safe