diff --git a/IHaskell/Display/Basic.hs b/IHaskell/Display/Basic.hs
--- a/IHaskell/Display/Basic.hs
+++ b/IHaskell/Display/Basic.hs
@@ -1,15 +1,19 @@
 {-# LANGUAGE TypeSynonymInstances, FlexibleInstances #-}
+
 module IHaskell.Display.Basic () where
 
-import IHaskell.Display
+import           IHaskell.Display
 
-import Text.Printf
+import           Text.Printf
 
 instance Show a => IHaskellDisplay (Maybe a) where
   display just = return $ Display [stringDisplay, htmlDisplay]
-    where 
+    where
       stringDisplay = plain (show just)
       htmlDisplay = html str
-      str = case just of
-        Nothing -> "<span style='color: red; font-weight: bold;'>Nothing</span>"
-        Just x -> printf "<span style='color: green; font-weight: bold;'>Just</span><span style='font-family: monospace;'>%s</span>" (show x)
+      str =
+        case just of
+          Nothing -> "<span style='color: red; font-weight: bold;'>Nothing</span>"
+          Just x -> printf
+                      "<span style='color: green; font-weight: bold;'>Just</span><span style='font-family: monospace;'>%s</span>"
+                      (show x)
diff --git a/ihaskell-basic.cabal b/ihaskell-basic.cabal
--- a/ihaskell-basic.cabal
+++ b/ihaskell-basic.cabal
@@ -10,7 +10,7 @@
 -- 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 instances for basic types
@@ -61,8 +61,7 @@
               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,
                        ihaskell >= 0.5
   
   -- Directories containing source files.