diff --git a/System/Random/SFMT.hs b/System/Random/SFMT.hs
--- a/System/Random/SFMT.hs
+++ b/System/Random/SFMT.hs
@@ -1,7 +1,7 @@
-{-# LANGUAGE CPP #-}
-{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE UnboxedTuples #-}
+{-# LANGUAGE CPP #-}
 
 module System.Random.SFMT
     ( -- * Gen
@@ -41,6 +41,10 @@
 import Unsafe.Coerce
 import System.IO.Unsafe
 
+#if !MIN_VERSION_primitive(0,6,0)
+#define PrimBase PrimMonad
+#endif
+
 newtype Gen s = Gen (ForeignPtr SFMT)
 instance Show (Gen s) where
     show = unsafePerformIO . getIDString
@@ -71,7 +75,7 @@
     sfmt_init_by_array bytes (castPtr ptr) (fromIntegral $ len `quot` 4)
     Gen `liftM` newForeignPtr finalizerFree bytes
 
-withSystemRandom :: PrimMonad m => (Gen (PrimState m) -> m a) -> IO a 
+withSystemRandom :: PrimBase m => (Gen (PrimState m) -> m a) -> IO a
 withSystemRandom m = do
     bs  <- getEntropy (constSFMT_N * 16)
     gen <- initializeFromByteString bs
@@ -83,10 +87,10 @@
 type GenIO   = Gen (PrimState IO)
 type GenST s = Gen (PrimState (ST s))
 
-asGenIO :: (GenIO -> IO a) -> GenIO -> IO a 
+asGenIO :: (GenIO -> IO a) -> GenIO -> IO a
 asGenIO = id
 
-asGenST :: (GenST s -> ST s a) -> GenST s -> ST s a 
+asGenST :: (GenST s -> ST s a) -> GenST s -> ST s a
 asGenST = id
 
 genRand :: PrimMonad m => (Ptr SFMT -> IO a) -> Gen (PrimState m) -> m a
@@ -253,7 +257,7 @@
 save (Gen gen) = unsafePrimToPrim . withForeignPtr gen $ \ptr ->
     Seed `liftM` S.packCStringLen (castPtr ptr, sizeOfSFMT)
 
-restore :: PrimMonad m => Seed -> m (Gen (PrimState m)) 
+restore :: PrimMonad m => Seed -> m (Gen (PrimState m))
 restore (Seed bs) = unsafePrimToPrim . S.unsafeUseAsCString bs $ \ptr -> do
     bytes <- mallocBytes sizeOfSFMT
     copyBytes bytes (castPtr ptr) sizeOfSFMT
diff --git a/sfmt.cabal b/sfmt.cabal
--- a/sfmt.cabal
+++ b/sfmt.cabal
@@ -1,5 +1,5 @@
 name:                sfmt
-version:             0.1.0
+version:             0.1.1
 synopsis:            SIMD-oriented Fast Mersenne Twister(SFMT) binding.
 description:         this library has mwc-random<http://hackage.haskell.org/package/mwc-random> like api.
 license:             BSD3
@@ -20,8 +20,8 @@
 library
   exposed-modules:     System.Random.SFMT
   other-modules:       System.Random.SFMT.Foreign
-  build-depends:       base       >=4.6  && <4.8
-                     , primitive  >=0.5  && <0.6
+  build-depends:       base       >=4.6  && <4.9
+                     , primitive  >=0.5  && <0.7
                      , bytestring >=0.10 && <0.11
                      , entropy    >=0.3  && <0.4
   default-language:    Haskell2010