diff --git a/online.cabal b/online.cabal
--- a/online.cabal
+++ b/online.cabal
@@ -1,11 +1,11 @@
--- This file has been generated from package.yaml by hpack version 0.20.0.
+-- This file has been generated from package.yaml by hpack version 0.28.2.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 0e52ec83c8732aad81bae413979e21c904825f1675946b464248c15cb19ae656
+-- hash: 23ad67040f06c24d3eb357c48f10a503d156cb1d8cf9ded5a9f749d497c3f937
 
 name:           online
-version:        0.2.3.0
+version:        0.3.0.0
 synopsis:       online statistics
 description:    transformation of statistics to online algorithms
 category:       statistics
@@ -18,7 +18,6 @@
 license-file:   LICENSE
 build-type:     Simple
 cabal-version:  >= 1.10
-
 extra-source-files:
     stack.yaml
 
diff --git a/src/Online/Averages.hs b/src/Online/Averages.hs
--- a/src/Online/Averages.hs
+++ b/src/Online/Averages.hs
@@ -151,7 +151,7 @@
 would estimate the one-step autocorrelation relationship of the previous value and the current value over the entire sample set.
 
 -}
-autocorr :: (BoundedField a) => Fold a a -> Fold (a, a) a -> Fold a a
+autocorr :: (RealFloat a) => Fold a a -> Fold (a, a) a -> Fold a a
 autocorr central corrf =
   case central of
     (Fold mStep mBegin mDone) ->
diff --git a/src/Online/Quantiles.hs b/src/Online/Quantiles.hs
--- a/src/Online/Quantiles.hs
+++ b/src/Online/Quantiles.hs
@@ -16,7 +16,8 @@
 import Data.List.NonEmpty (NonEmpty)
 import Data.TDigest
 import Data.TDigest.Internal
-import Data.TDigest.Postprocess ()
+import Data.TDigest.Tree.Internal (TDigest(..), size, emptyTDigest, insertCentroid, relMaxSize, absMaxSize, toMVector)
+import Data.TDigest.Postprocess (HistBin, histogram)
 import qualified Data.Vector.Algorithms.Heap as VHeap
 import qualified Data.Vector.Unboxed as VU
 import NumHask.Prelude
@@ -86,8 +87,8 @@
 onlineCompress :: OnlineTDigest -> OnlineTDigest
 onlineCompress otd@(OnlineTDigest Nil _ _) = otd
 onlineCompress otd@(OnlineTDigest t _ _)
-  | Data.TDigest.Internal.size t > relMaxSize * compression &&
-      Data.TDigest.Internal.size t > absMaxSize = onlineForceCompress otd
+  | Data.TDigest.Tree.Internal.size t > relMaxSize * compression &&
+      Data.TDigest.Tree.Internal.size t > absMaxSize = onlineForceCompress otd
   | otherwise = otd
   where
     compression = 25
diff --git a/stack.yaml b/stack.yaml
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,11 +1,8 @@
-resolver: nightly-2018-04-05
+resolver: nightly-2018-06-02
 
 packages:
   - .
 
-extra-deps:
-  - numhask-0.2.0.0
-  - numhask-prelude-0.0.3.0
-  - tdigest-0.1
+extra-deps: []
 
-allow-newer: true
+# allow-newer: true