diff --git a/checkers.cabal b/checkers.cabal
--- a/checkers.cabal
+++ b/checkers.cabal
@@ -1,5 +1,5 @@
 Name:                checkers
-Version:             0.3.2
+Version:             0.4.0
 Cabal-Version:       >= 1.6
 Synopsis:            Check properties on standard classes and data structures.
 Category:            Testing
@@ -27,7 +27,7 @@
 Library
   hs-Source-Dirs:      src
   Extensions:
-  Build-Depends:       base < 5, random, QuickCheck>=2.3 && <2.7, array >= 0.1
+  Build-Depends:       base < 5, random, QuickCheck>=2.3 && <2.8, array >= 0.1
   Exposed-Modules:     
                        Test.QuickCheck.Utils
                        Test.QuickCheck.Checkers
diff --git a/src/Test/QuickCheck/Checkers.hs b/src/Test/QuickCheck/Checkers.hs
--- a/src/Test/QuickCheck/Checkers.hs
+++ b/src/Test/QuickCheck/Checkers.hs
@@ -51,7 +51,8 @@
 import qualified Control.Exception as Ex
 import Data.List (foldl')
 import System.Random
-import Test.QuickCheck
+import Test.QuickCheck hiding (generate)
+import Test.QuickCheck.Random (QCGen, newQCGen)
 -- import System.IO.Unsafe
 
 import Test.QuickCheck.Gen      (Gen (..)) -- for rand
@@ -442,12 +443,13 @@
 
 -- | Generate n arbitrary values
 arbs :: Arbitrary a => Int -> IO [a]
-arbs n = fmap (\ rnd -> generate n rnd (vector n)) newStdGen
 
+arbs n = fmap (\ rnd -> generate n rnd (vector n)) newQCGen
+
 -- | Produce n values from a generator
 gens :: Int -> Gen a -> IO [a]
 gens n gen =
-  fmap (\ rnd -> generate 1000 rnd (sequence (replicate n gen))) newStdGen
+  fmap (\ rnd -> generate 1000 rnd (sequence (replicate n gen))) newQCGen
 
 -- The next two are from twanvl:
 
@@ -500,10 +502,10 @@
 
 -- TODO: are there QC2 replacements for these QC1 operations?
 
-rand :: Gen StdGen
+rand :: Gen QCGen
 rand = MkGen (\r _ -> r)
 
-generate :: Int -> StdGen -> Gen a -> a
+generate :: Int -> QCGen -> Gen a -> a
 generate n rnd (MkGen m) = m rnd' size
  where
   (size, rnd') = randomR (0, n) rnd
diff --git a/src/Test/QuickCheck/Instances/List.hs b/src/Test/QuickCheck/Instances/List.hs
--- a/src/Test/QuickCheck/Instances/List.hs
+++ b/src/Test/QuickCheck/Instances/List.hs
@@ -8,7 +8,7 @@
        ,decreasingInf,nonincreasingInf
        ) where
 
-import Test.QuickCheck
+import Test.QuickCheck hiding (infiniteList)
 import Test.QuickCheck.Instances.Num
 import Control.Applicative