diff --git a/IHaskell/Display/Plot.hs b/IHaskell/Display/Plot.hs
--- a/IHaskell/Display/Plot.hs
+++ b/IHaskell/Display/Plot.hs
@@ -1,18 +1,15 @@
-{-# LANGUAGE NoImplicitPrelude #-}
-
 module IHaskell.Display.Plot where
 
-import           ClassyPrelude
-
 import qualified Data.ByteString.Char8 as Char
-
 import           Graphics.Rendering.Plot
+import           Control.Monad (void)
+import           Control.Applicative ((<$>))
 
 import           IHaskell.Display
 
 instance IHaskellDisplay (Figure a) where
   display fig = do
-    let figure = fig >> return ()
+    let figure = void fig
     pngDisp <- figureData figure PNG
     svgDisp <- figureData figure SVG
     return $ Display [pngDisp, svgDisp]
@@ -31,7 +28,7 @@
   writeFigure format fname (w, h) figure
 
   -- Read back, and convert to base64.
-  imgData <- readFile fname
+  imgData <- Char.pack <$> readFile fname
   let value =
         case format of
           PNG -> png w h $ base64 imgData
diff --git a/ihaskell-plot.cabal b/ihaskell-plot.cabal
--- a/ihaskell-plot.cabal
+++ b/ihaskell-plot.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:             0.3.0.0
 
 -- A short (one-line) description of the package.
 synopsis:            IHaskell display instance for Plot (from plot package)
@@ -59,7 +59,6 @@
              
   -- Other library packages from which modules are imported.
   build-depends:       base >=4.6 && <4.9,
-                       classy-prelude >= 0.10.5,
                        plot,
                        bytestring,
                        ihaskell >= 0.6.2