diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.4.2
+
+- Support for aeson-0.10.
+
 ## 0.4.1
 
 - Added support for linear-1.20.
diff --git a/smoothie.cabal b/smoothie.cabal
--- a/smoothie.cabal
+++ b/smoothie.cabal
@@ -1,5 +1,5 @@
 name:                smoothie
-version:             0.4.1
+version:             0.4.2
 synopsis:            Smooth curves via several interpolation modes
 description:         This package exports several splines you can use
                      to interpolate points in between. It includes instances for
@@ -23,6 +23,7 @@
 
   default-extensions:  DeriveFoldable
                      , DeriveFunctor
+                     , DeriveGeneric
                      , DeriveTraversable
                      , FlexibleContexts
                      , FlexibleInstances
@@ -37,7 +38,7 @@
   build-depends:       base   >= 4.7  && < 5.0
                      , linear >= 1.16 && < 1.21
                      , vector >= 0.10 && < 0.12
-                     , aeson  >= 0.8  && < 0.10
+                     , aeson  >= 0.8  && < 0.11
                      , text   >= 1.2  && < 1.3
 
   hs-source-dirs:      src
diff --git a/src/Data/Spline/Curve.hs b/src/Data/Spline/Curve.hs
--- a/src/Data/Spline/Curve.hs
+++ b/src/Data/Spline/Curve.hs
@@ -32,6 +32,7 @@
 import Data.Spline.Key
 import Data.Vector ( Vector, (!?), fromList )
 import Linear ( Additive )
+import GHC.Generics ( Generic )
 
 -- |A @'Spline' a s@ is a collection of 'Key's with associated interpolation
 -- modes.
@@ -44,7 +45,7 @@
 newtype Spline a s = Spline {
     -- |Extract the 'Key's.
     splineKeys :: Vector (Key (a s))
-  } deriving (Eq,Functor,Show)
+  } deriving (Eq,Generic,Functor,Show)
 
 instance (FromJSON (a s), Ord s) => FromJSON ((a s -> s) -> Spline a s) where
   parseJSON value = do
@@ -52,7 +53,8 @@
     pure $ \sampler -> spline sampler keys
 
 instance (ToJSON (a s)) => ToJSON (Spline a s) where
-  toJSON = Array . fmap toJSON . splineKeys
+  toJSON     = genericToJSON defaultOptions
+  toEncoding = genericToEncoding defaultOptions
 
 -- |Build a @'Spline' a s@.
 --