diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,8 @@
+0.2
+---
+* Removed the `data-default` dependency
+* Increased range of supported versions of `generic-deriving`.
+
 0.1.1
 -----
 * Ported `Data.Approximate.Numerics` from [analytics](http://github.com/analytics)
diff --git a/approximate.cabal b/approximate.cabal
--- a/approximate.cabal
+++ b/approximate.cabal
@@ -1,6 +1,6 @@
 name:          approximate
 category:      Numeric
-version:       0.1.1
+version:       0.2
 license:       BSD3
 cabal-version: >= 1.8
 license-file:  LICENSE
@@ -46,10 +46,9 @@
     bytes                     >= 0.7      && < 1,
     cereal                    >= 0.3.5    && < 0.4,
     comonad                   >= 3        && < 4,
-    data-default              >= 0.5      && < 0.6,
     deepseq                   >= 1.3      && < 1.5,
     distributive              >= 0.3      && < 1,
-    generic-deriving          >= 1.4      && < 1.6,
+    generic-deriving          >= 1.4      && < 1.7,
     ghc-prim,
     hashable                  >= 1.1.2.3  && < 1.3,
     hashable-extras           >= 0.1      && < 1,
diff --git a/src/Data/Approximate/Mass.hs b/src/Data/Approximate/Mass.hs
--- a/src/Data/Approximate/Mass.hs
+++ b/src/Data/Approximate/Mass.hs
@@ -24,7 +24,6 @@
 import Data.Bytes.Serial as Bytes
 import Data.Copointed
 import Data.Data
-import Data.Default
 import Data.Foldable
 import Data.Functor.Bind
 import Data.Functor.Extend
@@ -156,10 +155,6 @@
 instance Copointed Mass where
   copoint (Mass _ a) = a
   {-# INLINE copoint #-}
-
-instance Default a => Default (Mass a) where
-  def = Mass 1 def
-  {-# INLINE def #-}
 
 instance Applicative Mass where
   pure = Mass 1