diff --git a/IHaskell/Display/Charts.hs b/IHaskell/Display/Charts.hs
--- a/IHaskell/Display/Charts.hs
+++ b/IHaskell/Display/Charts.hs
@@ -1,16 +1,17 @@
 {-# LANGUAGE NoImplicitPrelude, CPP #-}
+
 module IHaskell.Display.Charts () where
 
-import ClassyPrelude
+import           ClassyPrelude
 
-import System.Directory
-import Data.Default.Class
-import Graphics.Rendering.Chart.Renderable
-import Graphics.Rendering.Chart.Backend.Cairo
+import           System.Directory
+import           Data.Default.Class
+import           Graphics.Rendering.Chart.Renderable
+import           Graphics.Rendering.Chart.Backend.Cairo
 import qualified Data.ByteString.Char8 as Char
-import System.IO.Unsafe
+import           System.IO.Unsafe
 
-import IHaskell.Display
+import           IHaskell.Display
 
 width :: Width
 width = 450
@@ -22,8 +23,8 @@
   display renderable = do
     pngDisp <- chartData renderable PNG
 
-    -- We can add `svg svgDisplay` to the output of `display`,
-    -- but SVGs are not resizable in the IPython notebook.
+    -- We can add `svg svgDisplay` to the output of `display`, but SVGs are not resizable in the IPython
+    -- notebook.
     svgDisp <- chartData renderable SVG
 
     return $ Display [pngDisp, svgDisp]
@@ -34,17 +35,17 @@
 
   -- Write the PNG image.
   let filename = ".ihaskell-chart.png"
-      opts = def{_fo_format = format, _fo_size = (width, height)}
-      toFile = renderableToFile opts
+      opts = def { _fo_format = format, _fo_size = (width, height) }
+  mkFile opts filename renderable
 
+  -- Convert to base64.
+  imgData <- readFile filename
+  return $
+    case format of
+      PNG -> png width height $ base64 imgData
+      SVG -> svg $ Char.unpack imgData
 #if MIN_VERSION_Chart_cairo(1,3,0)
-  toFile filename renderable
+mkFile opts filename renderable = renderableToFile opts filename renderable
 #else
-  toFile renderable filename
+mkFile opts filename renderable = renderableToFile opts renderable filename
 #endif
-
-  -- Convert to base64.
-  imgData <- readFile $ fpFromString filename
-  return $ case format of
-    PNG -> png width height $ base64 imgData
-    SVG -> svg $ Char.unpack imgData
diff --git a/ihaskell-charts.cabal b/ihaskell-charts.cabal
--- a/ihaskell-charts.cabal
+++ b/ihaskell-charts.cabal
@@ -7,7 +7,7 @@
 -- PVP summary:      +-+------- breaking API changes
 --                   | | +----- non-breaking API additions
 --                   | | | +--- code changes with no API change
-version:             0.2.0.0
+version:             0.2.1.0
 
 -- A short (one-line) description of the package.
 synopsis:            IHaskell display instances for charts types
@@ -58,14 +58,14 @@
               OverloadedStrings
              
   -- Other library packages from which modules are imported.
-  build-depends:       base ==4.6.* || ==4.7.*,
-                       classy-prelude >=0.6,
+  build-depends:       base >=4.6 && <4.9,
+                       classy-prelude >=0.10.5,
                        bytestring,
                        data-default-class,
                        directory,
                        Chart,
-                       Chart-cairo,
-                       ihaskell >= 0.5
+                       Chart-cairo >=1.2,
+                       ihaskell >= 0.6.2
   
   -- Directories containing source files.
   -- hs-source-dirs: